Isotope practice worksheet answers pdf

It takes only a couple of minutes. Follow these simple instructions to get Isotope Practice Worksheet completely ready for sending: Choose the sample you will need in our library of templates. Open the document in …

Isotope Practice Worksheet Answers PDF. Check out how easy it is to complete and eSign documents online using fillable templates and a powerful editor. ... In case you use an iOS device such as an iPhone or iPad, easily generate electronic signatures for signing a isotope practice worksheet in PDF formatting. signNow has paid close attention to ...molecular ion and will EXACTLY mirror the relative abundance of the second isotope. That means that for Bromine, the two peaks are almost identical in height, while for Chlorine the second peak is 1/3 the size of the first peak. Practice telling if the MS data below show molecules that contain Br, Cl or neither. Atom Mass Relative AbundanceQ6. Which of the following are permissible sets of quantum numbers for an electron in a hydrogen atom. For those combinations that are permissible, write the appropriate designation for the subshell to which the orbital belongs (ex. 1s) [2, 1, 1, +1/2] [1, 0, ‐1, ‐1/2] [4, 2, ‐2, +1/2] [3, 3, 0, ‐1/2]Half-life Practice Worksheet Sodium-24 has a half-life of 15 hours. How much sodium-24 will remain in an 18.0 g sample after 60 hours? > 03 i Shr. After 42 days a 2.0 g sample of phosphorus-32 contains only 0.25 g of the isotope. What is the half-life of phosphorus-32? Polonium-214 has a relatively short half-life of 64 seconds. How many Teaching children to read is an important skill they’ll use for the rest of their lives. When children need extra practice using their reading skills, it helps to have worksheets available. You can find an assortment of printable reading wo...Connectives worksheet. Coordinating conjunctions - exercises. But / and / so / because / or. Because / so - pdf exercises. Conjunctions test - worksheet. Conjunctions - handout. Conjunctions - handouts. Coordinating conjunctions. Connectives and linking words.Jan 10, 2021 · Q21.4.27. Write a balanced equation for each of the following nuclear reactions: bismuth-212 decays into polonium-212. beryllium-8 and a positron are produced by the decay of an unstable nucleus. neptunium-239 forms from the reaction of uranium-238 with a neutron and then spontaneously converts into plutonium-239.

nitudes of the associated isotope effects. Examples of equilibrium and kinetic isotope effects are shown in Figure 2. As indicated, the magnitude of an equilibrium isotope effect can be represented by an equilibrium con-stant. In this example, the reactants and products are chemically identical (carbon dioxide and bicarbonate in each case).1. In a neutral atom the number of protons equals the number of electrons. 2. An atom can NEVER gain or lose protons 3. The number of protons equals the atomic number Ion Practice Set 1. What is an ion? 2. What does the number next to the ions signify? Complete the following table, using the periodic table in the back of your book.Check your answer by turning on Show equation and clicking Play. Modify your equation if. necessary. What isotope is produced by the beta decay of carbon-14? _____ Practice: Turn off Show equation. Fill in the equations for the beta decay of iodine-131 and sodium-24 in the spaces below. Use the Gizmo to check your answers. The neutron becomes a ...It takes only a couple of minutes. Follow these simple instructions to get Isotope Practice Worksheet completely ready for sending: Choose the sample you will need in our library of templates. Open the document in …Boron has two naturally occurring isotopes with the natural abundances shown in the table below: Isotope Natural abundance (%) 10B 19.9 11B 80.1 Calculate the relative atomic mass of boron. Question 4 Rubidium has a relative atomic mass of 85.47 and consists of two naturally occurring isotopes, 85Rb (M = 84.91) and 87Rb (M = 86.91). Calculate ... Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ... Fill in the isotope names and any missing information, including isotope numbers from the chart. Use your periodic table and the information provided. # of protons 25 # of neutrons 17 15 # of electrons # of protons 32 30 32 # of electrons # of protons # of protons # of neutrons 48 # of neutrons 51 # of electrons # of electrons

T040 - A Love For Trains Intermediate. T037 - All Tenses - Two Short Stories Elementary. T035 - Present , Past and Present Perfect Tense Intermediate. T034 - All tenses - multiple choice Intermediate. Fill in the correct form - T26 Elementary. Make sentences with the words given - T 21 Intermediate. Fill in the correct form - T20 Advanced.2. Radioactive isotopes can break down. Stable isotopes do not break down. 3. The amount of parent isotope decreases, and the amount of daughter isotope increases. 4. 8 mg 5. No, because K-Ar dating can be used only for rocks that are older than about 1 million years. 6. by eating plants 7. Parent isotope Daughter isotope Half-life Classification of Nuclear Reactions, Practice Worksheet Types of Nuclear Reactions: Natural decay -A radionuclide emits radiation in the form of energy or small particles. (alpha, beta, beta+ (positron), and gamma emissions) Electron capture -A neutron poor radioisotope combines a proton with captured electron to produce a neutron. Fission Isotope Practice - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. practiceProtons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ...Part 2: Answer these: 1. The subatomic particle with no electrical charge is the 2. The subatomic particle with a positive charge is the 3. The subatomic particle with a negative charge is the 4. There are the same number of these two particles in an atom 5. The atomic number is the same as the number of. Where is most of the mass of an atom ...

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Isotope and Ions Practice Worksheet Name: _____ Part I: Isotopes 1. Define an isotope. 2. What would happen if the number of protons were to change in an atom? 3. Another way to write isotopes is to write the name of the element then add the mass number after a dash, for example, 14 6 C is carbon-14. Why isn’t the atomic number needed for this …3. How can you tell isotopes apart? For each of the following isotopes, write the number of protons, neutrons, and electrons. Chromium-58 Chromium-63 # of protons # of neutrons # of electrons Nitrogen-15 Nitrogen-20 # of protons # of neutrons # of electrons Fill in the isotope names and any missing information, including isotope numbers from ...5 isotope practice worksheet - Free download as PDF File (.pdf), Text File (.txt) or read online for free.Which isotope is the most abundant of the three? 40.00 amu. 41.00 amu. 35.00 amu. impossible to tell. Multiple Choice. 15 minutes. 1 pt. Calculate the average atomic mass of an element with the follow isotope information: 4.35% have a mass of 49.9461 amu, 83.79% have amass of 51.9405 amu, 9.50% have a mass of 52.9407 amu, and 2.36% have a …

Isotope and Ions Practice Worksheet Name: _____ Part I: Isotopes. Define an isotope. Isotopes are atoms of the same element with different atomic masses. What would happen if the number of protons were to change in an atom? You would get a different elementAdverbs: worksheets pdf, handouts to print, printable exercises. Adverbs of frequency, place, manner, degree, duration, relative, time. esl1 ( × % 2 ) + . . . Carbon-12 accounts for 99.45% of all of the carbon atoms, while carbon-14 only accounts for the remaining 0.55%. Since the carbon-12 isotope is more abundant, its mass is weighted more in the calculation of carbon’s atomic mass. The calculation of the atomic mass is shown below.atoms remaining and now 75 daughter atoms. Each parent-daughter isotope pair has its own half-life. To achieve the above example with U-238 takes 9 billion years (two half-lives). To achieve the above example with C-14 takes 11400 years (two half-lives). In the geologic environment, we use a mass spectrometer to count the number ofIsotope Worksheet Write the most common isotope in hyphen notation for the following elements. The most common isotope can be found by rounding the atomic mass found on the periodic table of elements to the nearest whole number. 1. Fill in the table with the correct information. 2. Describe the general arrangement of subatomic particles in the atom. 3. What contribution did these scientists make to atomic models of the atom? a. Dalton b. Thomson c. Rutherford 4. What is the isotope notation of the element that has an atomic number of 24 and a mass number of 52? 5.Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ... Chemistry Worksheet Isotope Notation NAME: Block. Metal, non- metal, or metalloid? Complete the table. Recall that A = mass number, Z = atomic number, and ions have charge! Name zSym+/- 24 Mg 30 • 108 112 Cd2+ 52 2- 24 Atom or ion? Atom Atom Atom Atom Atom Atom Atomic Mass Number Number no 30 50 125 69 80 53 38 94 56 # Of 36 …Isotope Practice Worksheet 1. What is an isotope? _____ _____ 2. What does the number next to isotopes signify? _____ _____ 3. How can you tell isotopes apart? _____ _____ For each of the following isotopes, write the # of protons, neutrons, and electrons. Chromium-58 Chromium-63 # of protons # of neutrons # of electrons Nitrogen-15 Nitrogen-20 ...Isotope Practice Worksheet Answer Key Form - Fill Out and Sign Printable PDF Template | signNow Isotope Worksheet Answers. Check out how easy it is to complete and eSign documents online using fillable templates and a powerful editor. Get everything done in minutes. Isotope Worksheet Answers.

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Math can be a challenging subject for many students, but it doesn’t have to be. With the help of engaging math practice worksheets, you can make math fun and help your students develop their math skills. Here are some tips on how to make ma...Express your answers to 3 significant figures. Exercise 1.6 Writing equations This exercise provides practice in balancing equations, including ionic equations, as well as the use of state symbols. Remember that when writing equations: You …Isotope name atomic # mass # # of protons # of neutrons # of electrons Potassium-37 Oxygen-17 uranium-235 uranium-238 boron-10 boron-11 Isotopes . For the isotopes listed below, give the number of protons, neutrons and electrons. 1. …Express your answers to 3 significant figures. Exercise 1.6 Writing equations This exercise provides practice in balancing equations, including ionic equations, as well as the use of state symbols. Remember that when writing equations: You …Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Isotope Worksheet Write the most common isotope in hyphen notation for the following elements. The most common isotope can be found by rounding the atomic mass found on the periodic table of elements to the nearest whole number. PART I. Answer the questions based on the above reading. What is an isotope? Isotopes are versions of the same element. They have the same number of protons and electrons as the element but different mass numbers and number of neutrons. What does the number next to isotopes signify? The number indicates the isotope’s mass number.Fe-72 is an isotope of Iron. Its actual mass is 71.9696 amu. a. Determine the calculated mass of the isotope. b. Determine the mass defect of this isotope. c. Determine the mass defect in kg of thi... Copper has only two stable isotopes: ^63Cu and ^65Cu, with masses of 62.929597 amu and 64.927789 amu, respectively.

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places in any of the numbers that make up your answer. 11 Example 2: 123.25 mL + 46.0 mL + 86.257 mL = 255.507 mL 11 I The answer is expressed as 255.5 mL since 46.0 mL has only one decimal place. 11 Perform the following operations expressing the answer in the correct number of significant figures. 1, 1.35 m x 2.467 m =Isotope Notation Chem. Worksheet 4-2 Answer Key.pdf: File Size: 396 kb: File Type: pdf: ... Naming Ionic Compounds Practice Worksheet - Answer Key.pdf: File Size: Part I: Isotopes. Define an isotope. Isotopes are atoms of the same element with different atomic masses. What would happen if the number of protons were to change in an atom? You would get a different element. Another way to write isotopes is to write the name of the element then add the mass number after a; dash, for example, 146 C is carbon-14.places in any of the numbers that make up your answer. 11 Example 2: 123.25 mL + 46.0 mL + 86.257 mL = 255.507 mL 11 I The answer is expressed as 255.5 mL since 46.0 mL has only one decimal place. 11 Perform the following operations expressing the answer in the correct number of significant figures. 1, 1.35 m x 2.467 m =Classification of Nuclear Reactions, Practice Worksheet Types of Nuclear Reactions: Natural decay -A radionuclide emits radiation in the form of energy or small particles. (alpha, beta, beta+ (positron), and gamma emissions) Electron capture -A neutron poor radioisotope combines a proton with captured electron to produce a neutron. Fission- Sample A has a mass of 24.0 g and a volume of 6.0 ml. - Sample B has a mass of 12.0 g and a volume of 6.0 ml. - Sample C has a mass of 12.0 g and a volume of 3.0 ml. 10. A graduated cylinder contains 17.5 ml of water. When a metal cube is placed onto the cylinder, its water level rises to 20.3 ml. Calculate the following:The other isotope, 65Cu, has an abundance of 30.91%. The average atomic mass between these two isotopes is 63.546 amu. Calculate the actual atomic mass of 65Cu. 7) Magnesium consists of three naturally occurring isotopes. The percent abundance of these isotopes is as follows: 24Mg (78.70%), 25Mg (10.13%), and 26Mg (11.7%). The averageIsotope Practice Worksheet Answers - Check out our science page for worksheets on well-liked science topics. We have an enormous collection of activities for matters corresponding to weather, animals, and rather more. Make your personal customized math worksheets, word search puzzles, bingo video games, quizzes, flash playing cards, calendars, and far more. Below you willd. All radioactive isotopes decay completely and disappear within a short time (1 year or less) 30. SrPredict the decay pathway for 90. (Strontium-88 is the most abundant stable isotope for Sr.) (Strontium-90 is a particularly hazardous radioactive isotope because, as an alkali earth metal, it will substitute for calcium in bones and teeth.) ….

Download Isotope Practice Worksheet and more Chemistry Lecture notes in PDF only on Docsity! Isotope Practice Worksheet Name: Learning Target: Use isotope notation to determine: element name/symbol, atomic number, number of electrons, number of neutrons, number of protons, mass number, atomic number, atomic mass.What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60? 60 A) cu 29 29 B) cu 60 C) 29Cu 60 D) cu E) 31cu 29 too 3. Identify the following based on the mass number and atomic number: 2X ... 51. A sample of sodium-24 with an activity of 12 mCi is used to study the route of blood flow in the circulatory system. If ...Ask the class to read through the remaining sections on the provided worksheet, and answer the questions. exShare answers from the class, ensuring that all students are able to press 18O/16O in terms of voltage and resistance before allowing them to move on to calculate 18O/16O ratio from the data provided.1.3 Chemistry Basics Sequence Atoms Ions & Isotopes Apply Sheet With Digital Option; 2 Get The Free Isotope Apply Worksheet Solutions Pdf Type; 3 Related posts of "Isotope Practice Worksheet Answers" 3.0.1 Special Right Triangles Worksheet; 3.0.2 Point Slope Form Worksheet; 3.0.3 Population Ecology Graphs Worksheet Answers; 3.0.4 Square And ...2. Complete the chart, then determine if it is the most common isotope – mark yes or no in the last column: Isotope name atomic # mass # # of protons # of neutrons # of electrons Most common? potassium-37 oxygen-16 uranium-235 3. Write the most common isotope in hyphen notation for the following elements. The most common isotopeIsotope Worksheet Write the most common isotope in hyphen notation for the following elements. The most common isotope can be found by rounding the atomic mass found on the periodic table of elements to the nearest whole number.Fill in the isotope names and any missing information, including isotope numbers from the chart. Use your periodic table and the information provided. # of protons 25 # of neutrons 17 15 # of electrons # of protons 32 30 32 # of electrons # of protons # of protons # of neutrons 48 # of neutrons 51 # of electrons # of electronsLearn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Isotopes Worksheet PART I. Answer the questions based on the above reading. 1. What is an isotope? Isotopes are versions of the same element. They have the same number of protons and electrons as the element but different mass numbers and number of neutrons. 2. What does the number next to isotopes signify? Isotope practice worksheet answers pdf, of 78.92 u while 49.46% of the naturally occurring isotopes of bromine have an atomic mass of 80.92 u. Calculate the average atomic mass of bromine, showing all work: 2. Using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest .01 u) : Show all work! Isotope: 12 24Mg Percent abundance: 78.70% ..., d. All radioactive isotopes decay completely and disappear within a short time (1 year or less) 30. SrPredict the decay pathway for 90. (Strontium-88 is the most abundant stable isotope for Sr.) (Strontium-90 is a particularly hazardous radioactive isotope because, as an alkali earth metal, it will substitute for calcium in bones and teeth.) , Part I: Isotopes. Define an isotope. Isotopes are atoms of the same element with different atomic masses. What would happen if the number of protons were to change in an atom? You would get a different element. Another way to write isotopes is to write the name of the element then add the mass number after a; dash, for example, 146 C is carbon-14., Radiometric Dating Worksheet When radioactive isotopes (parent – P) decay, they produce daughter products (D) at a constant rate, called the half-life (T). Example: if we start with 100 atoms of the parent, after one half-life, there will be 50 parent atoms remaining and 50 daughter atoms newly made., 1. Fill in the table with the correct information. 2. Describe the general arrangement of subatomic particles in the atom. 3. What contribution did these scientists make to atomic models of the atom? a. Dalton b. Thomson c. Rutherford 4. What is the isotope notation of the element that has an atomic number of 24 and a mass number of 52? 5., Nitrogen 7 7 10 Aluminum 27 10 56 26 24 29 35 Cu1+ 64 29 27. Match each of the positive ions listed with the total number of electrons that ion contains. Use your periodic table. The same answer may be used more than once. A) 2 B) 10 C) 21 D) 23 E) 24. F) 25 G) 36 H) 48 I) 76 J) 81. , 1. An isotope of cesium (cesium-137) has a half-life of 30 years. If 1,0 g of cesium-137 disintegrates over a period of 90 years, how many g of cesium-137 would remain? A We) r" 2. Actinium-226 has a half-life of 29 hours. If 100 mg of actinium-226 disintegrates over a period of 58 hours, how many mg of actinium-226 will remain? 3.. leon^yX s ,2<h, Created Date: 10/15/2014 7:14:42 AM, Isotopes Worksheet PART I. Answer the questions based on the above reading. 1. What is an isotope? Isotopes are versions of the same element. They have the same number of protons and electrons as the element but different mass numbers and number of neutrons. 2. What does the number next to isotopes signify?, Stoichiometry WorkSheet #1: Worked Solutions Answer the following questions on your own paper. Show all work. Circle the final answer, giving units and the correct number of significant figures. 1. Based on the following equation, how many moles of each product are produced when 5.9 moles of Zn(OH) 2 are reacted with H 3 PO 4? (You need, Complete the following chart: Isotope atomic # mass # # of protons # of neutrons # of electrons 235 92𝑈 238 92𝑈 10 5𝐵 11 5𝐵 3. In a sample of 400 lithium atoms, it is found that 30 atoms are lithium-6 (6.015 g/mol) and 370 atoms are lithium-7 (7.016 g/mol)., 1. An isotope of cesium (cesium-137) has a half-life of 30 years. If 1,0 g of cesium-137 disintegrates over a period of 90 years, how many g of cesium-137 would remain? A We) r" 2. Actinium-226 has a half-life of 29 hours. If 100 mg of actinium-226 disintegrates over a period of 58 hours, how many mg of actinium-226 will remain? 3.. leon^yX s ,2<h, d. All radioactive isotopes decay completely and disappear within a short time (1 year or less) 30. SrPredict the decay pathway for 90. (Strontium-88 is the most abundant stable isotope for Sr.) (Strontium-90 is a particularly hazardous radioactive isotope because, as an alkali earth metal, it will substitute for calcium in bones and teeth.) , Nitrogen 7 7 10 Aluminum 27 10 56 26 24 29 35 Cu1+ 64 29 27. Match each of the positive ions listed with the total number of electrons that ion contains. Use your periodic table. The same answer may be used more than once. A) 2 B) 10 C) 21 D) 23 E) 24. F) 25 G) 36 H) 48 I) 76 J) 81. , Part 2: Answer these: 1. The subatomic particle with no electrical charge is the 2. The subatomic particle with a positive charge is the 3. The subatomic particle with a negative charge is the 4. There are the same number of these two particles in an atom 5. The atomic number is the same as the number of. Where is most of the mass of an atom ..., Pogil Answer Key - 2x9xcandor.de. Classification Of Matter Worksheet Answer Key Pogil. pogil answer key in pdf kindle epub format also available for any devices anywhere related book to spread of pathogens. edu on January 4, 2022 by guest Kindle File Format Pogil Gas Variables Answer Key Thank you certainly much for downloading pogil gas variables …, neutrons, for any isotope. I can write the hyphen notation for any isotope given protons, neutrons, and electrons AND use the hyphen notation to find protons, neutrons, and electrons for an atom. 1. Here are three isotopes of an element: 612 C 613 C 614 C a. The element is: _____ b. The number 6 refers to the _____ c., ‪Isotopes and Atomic Mass‬ - PhET Interactive Simulations, Isotope Worksheet. Write the most common isotope in hyphen notation for the following elements. The most common isotope can be found by rounding the atomic mass found on the periodic table of elements to the nearest whole number. 1. Sodium: _____ 2. Aluminum: _____ 3. Arsenic ..., 2. Radioactive isotopes can break down. Stable isotopes do not break down. 3. The amount of parent isotope decreases, and the amount of daughter isotope increases. 4. 8 mg 5. No, because K-Ar dating can be used only for rocks that are older than about 1 million years. 6. by eating plants 7. Parent isotope Daughter isotope Half-life , Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ..., Alexander-goers.de › 8Page Not Found. 4. 2, estimate rational numbers, number line Jan 14, 2008 · Nervous System Worksheet Answers. impulsive force model worksheet 4 conservation of momentum ii answers Jan 14, 2013 -- Impulse: The product of the force exerted on an object and the time Solution: Because the impulse equals the change in …, Isotope Isotope Notation Atomic # Protons Electrons Neutrons Nickel-58 15 15 53 74 36 48 34 45 Calcium-40 Chlorine-37 9. Calculate the average atomic mass of chlorine if its isotopes and % abundances are as follows. Show all work. Mass of Isotope % abundance 36.96590 24.47 34.96885 75.53 , Unit-6-Isotope and Ions Practice Worksheet-cglass. ← Back. Join our. Ledger Community. Connect with our admissions department to get more information on how ..., 5 isotope practice worksheet - Free download as PDF File (.pdf), Text File (.txt) or read online for free., Isotope practice worksheets are sheets of paper containing questions and problems related to isotopes and their properties. These worksheets are typically used in chemistry classes to help students practice and understand isotopes and their properties., Chemical bonds are the attractive forces that hold atoms together in the form of compounds. A chemical bond is formed when electrons are shared between two atoms. There are three types of bonds: covalent bonds, polar covalent bonds and ionic bonds. The simplest example of bonding is demonstrated by the H 2 molecule., The nuclear reaction can be written as: 12 25 Mg + 2 4 He 1 1 H + Z A X. where A is the mass number and Z is the atomic number of the new nuclide, X. Because the sum of the mass numbers of the reactants must equal the sum of the mass numbers of the products: 25 + 4 = A + 1, or A = 28. Similarly, the charges must balance, so:, Atomic Mass and Atomic Number Worksheet - Key Name of Element Symbol Atomic Number Atomic Mass Protons Neutrons Electrons copper Cu 29 64 29 35 29 tin Sn 50 119 50 69 50 iodine I 53 127 53 74 53 uranium U 92 238 92 146 92 potassium K 19 39 19 20 19 lithium Li 3 7 3 4 3 oxygen O 8 16 8 8 8 gold Au 79 197 79 118 79 , Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ..., Iodine is 80% 127I, 17% 126I, and 3% 128I. Calculate the average atomic mass of iodine. 10. The natural abundance for boron isotopes is 19.9% 10B and 80.1% 11B . Calculate boron’s atomic mass. 11. Hydrogen is 99% 1H, 0.8% 2H, and 0.2% 3H. Calculate its average atomic mass. 85 87 12. Rubidium is a soft, silvery-white metal that has two common ..., Isotope Practice Worksheet Teacher Background Information: Atoms of a given element which have the same number of protons but different numbers of neutrons are called isotopes. Thus, isotopes have the same position in the periodic table, the same chemical properties and the same atomic charge., Isotope and Ions Practice Worksheet Name: _____ Part I: Isotopes. 1. Define an isotope. 2. What would happen if the number of protons were to change in an atom? 3. Another way to write isotopes is to write the name of the element then add the mass number after a dash, for example, 146C is carbon-14. Why isn’t the atomic number needed for this ...