Using the list of naturally occurring isotopes in Appendix 5, determine the number of electrons, protons and neutrons present in an atom of each isotope of 

(a) Al, 

(b) Br 

(c) Fe, 

and give appropriate notation to show these data for each isotope.

Data from Appendix 5

Transcribed Image Text:

Element Actinium Aluminium Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Boron Bromine Cadmium Caesium Calcium Califomium Carbon Cerium Chlorine Chromium Symbol Atomic number, Z Ac Al Am Sb Ar As At Ba Bk Be Bi B Br Cd Cs Ca Cf с Ce CI Cr 89 13 95 51 18 33 85 56 97 4 83 5 35 48 55 20 98 6 58 17 24 Mass number of isotope (% abundance) artificial isotopes only; mass number range 224-229 27(100) artificial isotopes only; mass number range 237-245 121(57.21), 123(42.79) 36(0.34), 38(0.06), 40(99.6) 75(100) artificial isotopes only; mass number range 205-211 130(0.11), 132(0.10), 134(2.42), 135(6.59), 136(7.85), 137(11.23), 138(71.70)) artificial isotopes only; mass number range 243-250 9(100) 209(100) 10(19.9), 11(80.1) 79(50.69), 81(49.31) 106(1.25), 108(0.89), 110(12.49), 111(12.80), 112(24.13), 113(12.22), 114(28.73), 116(7.49) 133(100) 40(96.94), 42(0.65), 43(0.13), 44(2.09), 48(0.19) artificial isotopes only; mass number range 246-255 12(98.93), 13(1.07) 136(0.19), 138(0.25), 140(88.45), 142(11.11) 35(75.76), 37(24.24) 50(4.345), 52(83.79), 53(9.50), 54(2.365)