試題詳解

84. How many protons, neutrons, and electrons does the ion ¹⁸O^2- have?
(A) 8 protons, 8 neutrons, 8 electrons
(B) 8 protons, 18 neutrons, 8 electrons
(C) 8 protons, 10 neutrons, 10 electrons
(D) 8 protons, 10 neutrons, 8 electrons
(E) 8 protons, 8 neutrons, 10 electrons