Isotope practice worksheet with answers

Explore and practice Nagwa’s free online educational courses and lessons for math and physics across different grades available in English for Egypt. ... Practice: Percentage Isotopic Abundance . ... Lesson Worksheet Download the Nagwa Classes App. Attend sessions, chat with your teacher and class, and access class-specific questions.

Isotope And Ions Practice Worksheet - The Wesley School. Answer key. Name: Period: Date. Worksheet: Atoms, Isotopes, and Ions. Atoms. The number of protons in an atom determines the identity of the atom.to calculate a weighted average of its isotope masses. a. Use the equation in question 1 to calculate the atomic mass of an element that has two isotopes, each with 50.00% abundance. One isotope has a mass of 63.00 amu and the other has a mass of 68.00 amu. b. Recalculate the atomic mass if instead there is 80.00% of the 63.00 amu isotopeLearn 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. Math practice worksheets are an invaluable tool when it comes to helping your child learn and master math skills. The primary benefit of using math practice worksheets is that they help your child develop their math skills.Radioactive Decay and Half-Life Page 4 of 5 Table N Selected Radioisotopes Nuclide Half-Life Decay Mode Nuclide Naine iysAu 2.69 d r gold-198 uG 5730 y r carbon-14 37ca 175 ms p+ calciuin-37 ^Co 5.26 y r cohuU-60 ^Gs 30.23 y r c(3sram-137 8.51 rain ii'oa-53 S20i?r 27.5 s a fi-an cram-220 3H 12.26 y r hydrogen-3 131J 8.07 a r iodine-lSl 3tK: 1.23 s P+ …‪Isotopes and Atomic Mass‬ - PhET Interactive Simulations

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?Explore and practice Nagwa’s free online educational courses and lessons for math and physics across different grades available in English for Egypt. Watch videos and use Nagwa’s tools and apps to help students achieve their full potential. Displaying all worksheets related to - Isotope And Ions Practice. Worksheets are Isotope practice work, Atoms ions and isotopes work answers, Scanned from a xerox multifunction er, Isotope practice answer key pdf, Isotopes and ions work answer key, Isotopes, Ions isotopes work with answers, Chemistry work name 235 similar and how are they. Plot your findings on the graph (Figure 6.11). Make sure you connect the data points on the graph by drawing in the decay curve. Use the completed chart and graph to answer the questions below. Figure 6.11 | Chart for plotting relationship between remaining amount of parent isotope and time and number of elapsed half-lives of a radioactive isotope.PROBLEM 3.1.1.10. Technetium-99 is prepared from 98 Mo. Molybdenum-98 combines with a neutron to give molybdenum-99, an unstable isotope that emits a β particle to yield an excited form of technetium-99, represented as 99 Tc *. This excited nucleus relaxes to the ground state, represented as 99 Tc, by emitting a γ ray.1. What is an isotope? — 2. When an isotope is written with a word, a dash and a number, what does the number next to isotope signify? And when there is a name with two numbers, what do these number signify? Give an example of each and label. 3. How can you tell isotopes apart? # of protons # of neutrons # of electrons b # of protons # of ...Answer: Calculate the number of half-lives; 0.003 seconds x 1 half-life = 3 half-lives 0.001 second • After 0 half-lives, 10 g ar6 left. After 1 half-life, 5 g'are left. After 2 half-lives, 2.5 g are left. After 3 half-lives, 1.25 g are left. Solve the following problems. 1. Th© half-life of radon-222 Is 3.8 days, How much of a 100 g sample ... Distance Learning: Atomic Structure Unit 5 Module Bundle (w/ Lab and Project) Isotopes Worksheet -- Review and Practice Problems. Atomic Theory and Nuclear Chemistry -- Unit Bundle. Isotopes Practice. 485. Browse isotopes practice resources on Teachers Pay Teachers, a marketplace trusted by millions of teachers for original educational resources.

Sep 23, 2021 · - Worksheet: 3. Practice Problems: Periodic Table and simpleNuclear reactions are going on all around us. Word equations included for all reactions. Nuclear Reactions Worksheet Answers - worksheet. Heat conductivity 2. Savable nuclear chemistry worksheet answer key samples. Gammon Jan 23, 2022 · Nuclear reactions …Displaying top 8 worksheets found for - Answer Key Isotope And Ions Practice. Some of the worksheets for this concept are Isotopesions work element element atomic mass, , Isotope practice work, Isotopes, Atom ion isotopes work, Scanned from a xerox multifunction er, Isotopes, Isotopes work with answers.Learn about different types of radiometric dating, such as carbon dating. Understand how decay and half life work to enable radiometric dating. Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.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 ...

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Isotope Practice Name: Answer Key Class: Gr.11 1. Here are three isotopes of an element: 12C 6 13C 14C 6 6 a. The element is: Carbon b. The number 6 refers to the Atomic Number c. The numbers 12, 13, and 14 refer to the Mass Number d. How many protons and neutrons are in the first isotope? e.Isotope Practice Worksheet Answer Key - Having a worksheet template easily accessible may help with furthering studying at home. Document analysis is the primary step in working with major sources. Teach your college students to assume through primary source documents for contextual understanding and to extract info to make …Check your answer by turning on Show equation and clicking Play. Modify your equation if. necessary. What isotope is produced when carbon-11 emits a positron? _____ Practice: Turn off Show equation. Fill in the equations for the positron emission of xenon- 118 and manganese-50 in the spaces below. Use the Gizmo to check your answers.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 …Handy tips for filling out Ions worksheet answer key pdf online. Printing and scanning is no longer the best way to manage documents. Go digital and save time with signNow, the best solution for electronic signatures.Use its powerful functionality with a simple-to-use intuitive interface to fill out Ions and isotopes worksheet answer key online, e-sign them, and …Displaying all worksheets related to - Isotope And Ions Practice. Worksheets are Isotope practice work, Atoms ions and isotopes work answers, Scanned from a xerox multifunction er, Isotope practice answer key pdf, Isotopes and ions work answer key, Isotopes, Ions isotopes work with answers, Chemistry work name 235 similar and how are they.

Free biology worksheets and answer keys are available from the Kids Know It Network and The Biology Corner, as of 2015. Help Teaching offers a selection of free biology worksheets and a selection that is exclusive to subscribers.Distance Learning: Atomic Structure Unit 5 Module Bundle (w/ Lab and Project) Isotopes Worksheet -- Review and Practice Problems. Atomic Theory and Nuclear Chemistry -- Unit Bundle. Isotopes Practice. 485. Browse isotopes practice resources on Teachers Pay Teachers, a marketplace trusted by millions of teachers for original educational resources.c. the potassium isotope with 21 neutrons. Write isotopic symbols in the form AZX for each isotope. b. the copper isotope with 36 neutrons. Write isotopic symbols in the form AZX for each isotope. a. the copper isotope with 34 neutrons. Determine the number of protons and the number of neutrons in each isotope.Use a periodic table to find the numbers of protons, neutrons, electrons, etc. for atoms of the following elements. Protons, Neutrons, and Electrons Practice Worksheet Helpful Concepts: # Protons + # Neutrons = Atomic mass # (this is usually shown as an average for all isotopes of an element) # Protons = Atomic Number # Electrons = Protons ...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. Element Name. Atomic. ... Answer the following questions regarding average atomic mass and isotopes.Liveworksheets transforms your traditional printable worksheets into self-correcting interactive exercises that the students can do online and send to the teacher ... Chemistry (1061818) Main content: Isotopes (1985279) Definitions and Nuclear Notations. Share / Print Worksheet. Google Classroom Microsoft Teams ...Isotope And Ions Practice Worksheet Answer Key. 3. homework Some of the worksheets for this concept are atom ion isotopes work activity one atoms and isotopes atoms ions and isotopes work answers atoms vs ions work answer key scanned from a xerox multifunction er isotopes and ions work answer key isotope practice answer key. 7th grade elements compounds and mixtures worksheet answers. Mar 7, 2023 · Isotope 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 will

This free chemistry worksheet is designed to help students show their understanding of isotopes. Each question has a pair of atoms and students decide whether each pair are atoms of different elements or different isotopes of the same element. Then, students write the chemical symbol below each of the atoms. This page would be great for lower ...

Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a ...21 PRACTICE PROBLEM. Answer the following questions: a) Identify the number of subatomic particles in tin (II)-121. b) Write the symbol of the isotope in the previous question. c) Identify the mass number of palladium that has 51 neutrons. d) Identify the neutral element that could have an isotope with a mass number of 52 and 28 neutrons. 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. Displaying all worksheets related to - Answer Key Isotope And Ions Practice. Worksheets are Isotopesions work element element atomic mass, , Isotope practice work, Isotopes, Atom ion isotopes work, Scanned from a xerox multifunction er, Isotopes, Isotopes work with answers. *Click on Open button to open and print to worksheet.Isotope and Ions Practice Worksheet Name: _____ Part I: Isotopes. Define an isotope. Isotopes are atoms of the same element with different atomic …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...03. Look at the given isotopes on the worksheet. Identify the element and determine the number of protons and neutrons for each isotope. 04. Fill out the table or chart provided on the worksheet. Indicate the isotope …

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Displaying all worksheets related to - Isotope And Ions Practice. Worksheets are Isotope practice work, Atoms ions and isotopes work answers, Scanned from a xerox multifunction er, Isotope practice answer key pdf, Isotopes and ions work answer key, Isotopes, Ions isotopes work with answers, Chemistry work name 235 similar and how are they.Chem 107 chapter 4 worksheet isotope practice answer... Doc Preview. Pages 2. Identified Q&As 16. Solutions available. Total views 18. Community College of Baltimore County. CHEM. CHEM 107. UltraOyster2511. 9/17/2022. View full document. Students also studied. Isotope Practice Worksheet.pdf. Oakland University. CHM MISC.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 75.53Note: The electron configurations in this worksheet assume that lanthanum (La) is the first element in the 4f block and that actinium (Ac) is the first element in the 5f block. If your periodic table doesn’t agree with this, your answers for elements near the f-orbitals may be slightly different. 1) oxygen 1s22s22p4 2) sodium 1s22s22p63s1Sample Question. Came up with the idea that all matter is made up of tiny particles called atoms. Chadwick. Aristotle. Democritus. Odysseus. Immerse yourself in …Isotope Practice Worksheet Answers. Students are requested whether or not these components are an isotope type or the widespread type of an element. To the second quantity she added an excess of sodium carbonate which precipitated all the calcium out as 2 of calcium carbonate, CaCO three.Free Collection of Isotope Practice Worksheets for Students. A chemical element's isotope is a distinct form with a different number of neutrons in its nucleus. The majority of elements have several isotopes.Many exist permanently, while others may only exist briefly before decomposing into new elements.Ions And Isotopes. Displaying all worksheets related to - Ions And Isotopes. Worksheets are Isotopesions work element element atomic mass, Atom ion isotopes work, Scanned from a xerox multifunction er, Isotope practice work, Isotopes, , He sai, Atoms and ions. *Click on Open button to open and print to worksheet. 1.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. Isotope Notation: 1. Here are three isotopes of an element: 6 12 C 6 13 C 6 14 C a. The element is: ____carbon_____ b.Displaying all worksheets related to - Isotopes With Answer. Worksheets are Isotopes, Isotope practice work, Atoms and isotopes work, Isotopesions work element element atomic mass, Atoms and isotopes work, Atoms and isotopes work, Isotopes. *Click on Open button to open and print to worksheet. 1. Isotopes. ….

Chem 107 chapter 4 worksheet isotope practice answer... Doc Preview. Pages 2. Identified Q&As 16. Solutions available. Total views 18. Community College of Baltimore County. CHEM. CHEM 107. UltraOyster2511. 9/17/2022. View full document. Students also studied. Isotope Practice Worksheet.pdf. Oakland University. CHM MISC.Radioactive Decay and Half-Life Page 4 of 5 Table N Selected Radioisotopes Nuclide Half-Life Decay Mode Nuclide Naine iysAu 2.69 d r gold-198 uG 5730 y r carbon-14 37ca 175 ms p+ calciuin-37 ^Co 5.26 y r cohuU-60 ^Gs 30.23 y r c(3sram-137 8.51 rain ii'oa-53 S20i?r 27.5 s a fi-an cram-220 3H 12.26 y r hydrogen-3 131J 8.07 a r iodine-lSl 3tK: 1.23 s P+ …Provide the symbol of the isotopes given below: (a) Z = 72 and A = 174 (b) Z = 42 and A = 98 4 PRACTICE PROBLEM 5 PRACTICE PROBLEM Sodium has only one naturally occurring isotope while bromine has two naturally occurring isotopes ( 79 Br and 81 Br). Determine the number of protons, neutrons, and electrons present in Na 81 Br. 6 PRACTICE PROBLEMIsotope Practice Worksheet Name: LT 3.1: Use the periodic table to identify and count subatomic particles within the atom. I can use the atomic number of an element to identify protons and electrons for any element . I can apply the relationship, “mass number = protons + neutrons,” to find protons, neutrons, or mass for any element Answer: Calculate the number of half-lives; 0.003 seconds x 1 half-life = 3 half-lives 0.001 second • After 0 half-lives, 10 g ar6 left. After 1 half-life, 5 g'are left. After 2 half-lives, 2.5 g are left. After 3 half-lives, 1.25 g are left. Solve the following problems. 1. Th© half-life of radon-222 Is 3.8 days, How much of a 100 g sample ... 13 12 here are three isotopes of an element: Answer the questions based on the above reading. Some of the worksheets for this concept are protons neutrons and electrons practice work answer key, isotope practice. Structure Atomic Answer Key Worksheet Practice Basic Chemistry. Fill in the blanks (each table has a pair of.Fill in the isotope names and any missing information, including isotope numbers from the chart. Use your periodic table and the information provided. Iodine­ 85 Iodine­ 88 # of protons 53 53 # of neutrons 32 35 # of electrons 53 53 Iron­ 53 Iron­ 56 Mar 13, 2023 · 9.1095 ×10−28Kg 9.1095 × 10 − 28 K g. Unit electrical charge is 1.6022 ×10−19 1.6022 × 10 − 19 coulomb (C). The nucleus at the center of the atom contains one or more positively charged protons. All atoms of a given element have the same number of protons, which defines the element's atomic number, given the symbol Z Z. Isotope practice worksheet with answers, 08ABC (8.1 – 8.3) pH, pOH, Ka and pKa Answers. 08E (8.5) Acid Base Titration Simulation Answers. 08CDEGHIJ (8.3 – 8.5, 8.7 – 8.10) RHODIUM SUBSCRIBERS CAN DOWNLOAD A ZIPPED FILE OF ALL UNIT 08 WORKSHEETS. Access to a complete set of AP Chemistry worksheets (with answers) for the 2021-2022 AP Chemistry course., Apr 8, 2023 · 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 ... , 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. , Isotope And Ions Practice Worksheet - The Wesley School. Answer key. Name: Period: Date. Worksheet: Atoms, Isotopes, and Ions. Atoms. The number of protons in an atom determines the identity of the atom., 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, CHM152LL: Nuclear Chemistry Practice Worksheet Key Exercise 1: Complete the following table: Isotope Mass Number # of Protons # of Neutrons # of Electrons Strontium - 90 90 38 52 38 222Rn 222 86136 Exercise 1: Identify the unknown element in each to complete the following nuclear equations: a. Argon-40 is bombarded with a proton., annesmith123456789. An ion is an atom with a non neutral electric charge; an atom missing or having too many electrons. All atoms are isotopes, regardless of whether or not they are ions. Which isotope the atom is depends on the atomic number (number of protons) and the number of neutrons. , Isotopes and Ions Practice Set Answer Key.pdf - Google Sheets ... Loading… , 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 average, Feb 10, 2023 · February 10, 2023 by admin. Isotope Practice Worksheet Answer Key. Units, the attainable relation to gravitational constant is …. Calculate the proportion of accuracy within the determination of acceleration because of gravity ‘g’ from the above measurement. Its angular diameter is measured to be 35.72″. , ‪Isotopes and Atomic Mass‬ - PhET Interactive Simulations, 21-Apr-2022 ... Expert-Verified Answer ... Iotopes of elements are atoms of the same element which differ in their mass numbers due to differences in neutron ..., This free chemistry worksheet is designed to help students show their understanding of isotopes. Each question has a pair of atoms and students decide whether each pair are atoms of different elements or different isotopes of the same element. Then, students write the chemical symbol below each of the atoms. This page would be great for lower ... , 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 Abundance, Introduction to chemistry. Preparing to study chemistry. Elements and atoms. Average atomic mass. Worked example: Atomic weight calculation. The mole and Avogadro's number. Atomic number, mass number, and isotopes. Worked example: Identifying isotopes and ions. Isotope composition: Counting protons, electrons, and neutrons., Usually one isotope is the predominantly abundant isotope. For example, the average abundance of 12C is 98.89%, while the average abundance for 13C is 1.11%. The table below outlines the average isotopic abundances of elements that are most commonly measured for stable isotope measurements. , 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 ..., Practice Isotope Calculations 1 Worksheet Answers / Isotopes And Ions Teaching Resources :. Atoms of an element wi a different # of electrons. Calculate the average atomic mass of iron: Practice with calculating average atomic. The element copper has naturally occurring isotopes with mass numbers of 63 and 65., 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. Isotope Notation: 1. Here are three isotopes of an element: 612C 613C 6 14 C a. The element is: ____carbon______________ b., Introduction to chemistry. Preparing to study chemistry. Elements and atoms. Average atomic mass. Worked example: Atomic weight calculation. The mole and Avogadro's number. Atomic number, mass number, and isotopes. Worked example: Identifying isotopes and …, Answer a. 5 protons, 6 neutrons, 5 electrons. Answer b. 19 protons, 22 neutrons, 19 electrons. Answer c. 32 protons, 38 neutrons, 32 electrons . Exercise \(\PageIndex{1}\) For each isotope shown, give the number of protons, neutrons, and electrons. d) 44 20 Ca 2 + e) 41 19 K 1+ f) 18 8 O 2– Answer d. 20 protons, 24 neutrons, 18 electrons ..., Atoms And Isotopes Worksheet Answer Key. 1 mole sulfur = 6.02 x 1023 s atoms) answer: Text may be added and replaced, new objects ... Isotopes And Molecules Worksheet With Answer Key. (c) the preceding answers are correct. Web isotope practice worksheet name: Name these two isotopes c. Web When One Atom Connects With Another Atom, …, Mar 13, 2023 · 9.1095 ×10−28Kg 9.1095 × 10 − 28 K g. Unit electrical charge is 1.6022 ×10−19 1.6022 × 10 − 19 coulomb (C). The nucleus at the center of the atom contains one or more positively charged protons. All atoms of a given element have the same number of protons, which defines the element's atomic number, given the symbol Z Z. , Isotope Practice Name: Answer Key Class: Gr.11 1. Here are three isotopes of an element: 12C 6 13C 14C 6 6 a. The element is: Carbon b. The number 6 refers to the …, Isotope Practice Worksheet Answer Key. Units, the attainable relation to gravitational constant is …. Calculate the proportion of accuracy within the determination …, 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., 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 ... , View Isotopes_Worksheet.pdf from CHEM 1045 at Tallahassee Community College. ... ion_isotope_practice-key (1).docx. Adventist University of Health Sciences. SP 124. View More. PART I. Answer the questions based on the above reading. 1. What is an isotope? 2., 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, Download Lecture notes - Isotope Practice Worksheet | Katholieke Hogeschool Limburg | Isotope Practice Worksheet. Name: Learning Target: Use isotope notation to determine: element name/symbol, atomic number, number.., Worksheets/Practice, 4. A radioactive isotope has a half-life of 10 years. What fraction of the original mass will remain unchanged after 50 years? A. 1 2 B. 1 8 C. 1 16 D. 1 32 4. 5. The radioactive isotope carbon-14 can be used for A. determining the age of a sample B. determining medical disorders C. controlling ssion reaction D. controlling speeds of neutrons 5. 6., Isotope Practice Worksheet Name: LT 3.1: Use the periodic table to identify and count subatomic particles within the atom. I can use the atomic number of an element to identify protons and electrons for any element . I can apply the relationship, "mass number = protons + neutrons," to find protons, neutrons, or mass for any element