## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

(a) $^{6}Li+$ (b) $^{13}C-$
(a) The atom has 3 protons, 3 neutrons, and 2 electrons. The atom has 6 nucleons and the charge is +1. An atom with 3 protons is lithium. We can write the symbolic form of the element as follows: $^{6}Li+$ (b) The atom has 6 protons, 7 neutrons, and 7 electrons. The atom has 13 nucleons and the charge is -1. An atom with 6 protons is carbon. We can write the symbolic form of the element as follows: $^{13}C-$