The atomic number of magnesium is 12, it will achieve its stable electronic configuration by donating _______ number of electrons.
2
The explanation for the correct option (D):
Octet rule: The octet rule states that every atom to attain stability must be filled with " " electrons in its outermost electron shell.
: The atomic number of is, So there are electrons and its electronic configuration is
Thus, option (D) i.e., 2 is the correct option.