Chemical symbols are shorthand abbreviations<span> of the names of the 109 known </span>elements. Each element<span> ... Chemical symbols are </span>composed of one or two<span> letter</span>
I can tell you there certainly is enough information, so we can eliminate the fourth option right away.
Group two elements tend to form 2+ cations, and nitrogen forms 3- anions. To make a stable substance, we need those to cancel out. Calling the group 2 element X:
N2X3 would cause the charge to be 2(-3) + 3(2) = 0
This would mean 3 ions of X and 2 anions of N would be a stable ionic compound.
The tendency of an element to loose an electron and gain positive charge is called metallic character. So an element which easily looses its electron/electrons are called metals. Hope it helps
