A magnesium atom has an atomic number of 12,an atomic mass of 25,and a +2 charge.This atom would contain _____ protons,_____ neutrons,and _____ electrons.
A) 12; 25; 2
B) 12; 13; 14
C) 12; 13; 10
D) Not enough information is given to answer the question.

Question

Quizplus · Accepted Answer

The atomic number (12) indicates the number of protons. The atomic mass (25) minus the atomic number (12) gives the number of neutrons (13). A +2 charge means it has lost 2 electrons, so it has 10 electrons (12 - 2 = 10).

A Magnesium Atom Has an Atomic Number of 12,an Atomic