Question

An atom with an atomic number of 12 loses 2 electrons to become stable.The proton number of the atom before it loses electrons

a) 10
b) 11
c) 12
d) 14

Answer 1

The proton number of the atom before it loses electrons is 12.

Step-by-step explanation:

The atom with an atomic number of 12 that loses 2 electrons to become stable is a Magnesium atom. A neutral Magnesium atom has 12 protons, 12 electrons, and 12 neutrons. So the proton number of the atom before it loses electrons is 12, option c).