Question

for mg 2+ with 13 neutrons what is the number of protons *
40
56
100
13
54
78
131
44
10
53
25
11
22
12
this is a required question

Explanation:

Step1: Identify element

Mg is magnesium. Atomic number of magnesium is fixed.

Step2: Recall atomic - number property

Atomic number = number of protons. Magnesium has atomic number 12. Charge (2 +) is due to loss of electrons, not related to proton number. Neutron number is irrelevant here.

Answer:

1. Option: 12