Science, Tech, Math Science Nuclear Structure and Isotopes Practice Test Questions Protons, Neutrons and Electrons in an Atom Share Flipboard Email Print Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry in Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Updated March 08, 2017 Elements are identified by the number of protons in their nucleus. The number of neutrons in an atom's nucleus identifies the particular isotope of an element. The charge of an ion is the difference between the number of protons and electrons in an atom. Ions with more protons than electrons are positively charged and ions with more electrons than protons are negatively charged.This ten question practice test will test your knowledge of the structure of atoms, isotopes and monatomic ions. You should be able to assign the correct number of protons, neutrons and electrons to an atom and determine the element associated with these numbers.This test makes frequent use of the notation format ZXQAwhere:Z = total number of neucleons (sum of number of protons and number of neutrons)X = element symbolQ = charge of ion. The charges are expressed as multiples of the charge of an electron. Ions with no net charge are left blank.A = number of protons.You may wish to review this subject by reading the following articles.Basic Model of the AtomIsotopes and Nuclear Symbols Worked Example Problem #1Isotopes and Nuclear Symbols Worked Example Problem #2Isotopes and Nuclear Symbols Worked Example Problem #3Protons and Electrons in Ions Example ProblemA periodic table with atomic numbers listed will be useful to answer these questions. Answers to each question appear at the end of the test. 01 of 11 Question 1 If you are given a nuclear symbol, you can find the number of protons, neutrons, and electrons in an atom or ion. alengo / Getty Images The element X in the atom 33X16 is:(a) O - Oxygen(b) S - Sulfur(c) As - Arsenic(d) In - Indium 02 of 11 Question 2 The element X in the atom 108X47 is:(a) V - Vanadium(b) Cu - Copper(c) Ag - Silver(d) Hs - Hassium 03 of 11 Question 3 What is the total number of protons and neutrons in the element 73Ge?(a) 73(b) 32(c) 41(d) 105 04 of 11 Question 4 What is the total number of protons and neutrons in the element 35Cl-?(a) 17(b) 22(c) 34(d) 35 05 of 11 Question 5 How many neutrons are in the isotope of zinc: 65Zn30?(a) 30 neutrons(b) 35 neutrons(c) 65 neutrons(d) 95 neutrons 06 of 11 Question 6 How many neutrons are in the isotope of barium: 137Ba56?(a) 56 neutrons(b) 81 neutrons(c) 137 neutrons(d) 193 neutrons 07 of 11 Question 7 How many electrons are in an atom of 85Rb37?(a) 37 electrons(b) 48 electrons(c) 85 electrons(d) 122 electrons 08 of 11 Question 8 How many electrons in the ion 27Al3+13?(a) 3 electrons(b) 13 electrons(c) 27 electrons(d) 10 electrons 09 of 11 Question 9 An ion of 32S16 is found to have a charge of -2. How many electrons does this ion have?(a) 32 electrons(b) 30 electrons(c) 18 electrons(d) 16 electrons 10 of 11 Question 10 An ion of 80Br35 is found to have a charge of 5+. How many electrons does this ion have?(a) 30 electrons(b) 35 electrons(c) 40 electrons(d) 75 electrons 11 of 11 Answers 1. (b) S - Sulfur2. (c) Ag - Silver3. (a) 734. (d) 355. (b) 35 neutrons6. (b) 81 neutrons7. (a) 37 electrons8. (d) 10 electrons9. (c) 18 electrons10. (a) 30 electrons citecite this article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Nuclear Structure and Isotopes Practice Test Questions." ThoughtCo, Sep. 20, 2016, thoughtco.com/nuclear-structure-and-isotopes-practice-test-questions-604127. Helmenstine, Anne Marie, Ph.D. (2016, September 20). Nuclear Structure and Isotopes Practice Test Questions. Retrieved from https://www.thoughtco.com/nuclear-structure-and-isotopes-practice-test-questions-604127 Helmenstine, Anne Marie, Ph.D. "Nuclear Structure and Isotopes Practice Test Questions." ThoughtCo. https://www.thoughtco.com/nuclear-structure-and-isotopes-practice-test-questions-604127 (accessed April 21, 2018). copy citation Continue Reading