Question 1
The total numbers of neutrons, protons, and electrons in
138Ba
2+ are ________.
◦ 138 neutrons, 56 protons, 54 electrons
◦ 82 neutrons, 56 protons, 54 electrons
◦ 56 neutrons, 82 protons, 80 electrons
◦ 82 neutrons, 56 protons, 58 electrons
◦ 82 neutrons, 82 protons, 82 electrons
Question 2
The total numbers of neutrons, protons, and electrons in
31P
3- are:
◦ 15 neutrons, 31 protons, 15 electrons
◦ 16 neutrons, 15 protons, 18 electrons
◦ 31 neutrons, 15 protons, 18 electrons
◦ 15 neutrons, 16 protons, 12 electrons
◦ 16 neutrons, 16 protons, 18 electrons