16.An isotope, X, of a particular element has an atomic number of 15 and a mass number of 31. Therefore: a) Xis an isotope of phosphorus. b) Xhas 16 neutrons per atom. c) Xhas an atomic mass of 30.973. d) A and B. e) A, B, and C. 17.T F The number of neutrons in an atom is the same for all neutral atoms of that element. 18.T F The number of electrons in an atom is the same for all neutral atoms of that element. 19.402+20Cahas 20.Which of the following statements is (are) true? 21.A species with 12 protons and 10 electrons is 22.The numbers of protons, neutrons, and electrons in 3919K+are: a) 20 p, 19 n, 19 e b) 20 p, 19 n, 20 e c) 19 p, 20 n, 20 e d) 19 p, 20 n, 19 e e) 19 p, 20 n, 18 e 23.An ion is formed 24. The formula of water, H 2 O, suggests:
4 25.All of the following are true except:
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- Fall '13
- Atom, John Dalton