Question

Determine which is larger member of each pair A) Mg2+ or Al3+ B) N3- or O2-? Explain

Answer 1

A. The higher charge on Al^3+ causes the protons to pull in the outside electrons more than the smaller 2+ charge of Mg^2+; therefore, the Al^3+ will be smaller than Mg^2+.
B. Both N^3- and O^2- have extra electrons in their outer shells but those extra electrons, each carrying a negative charge repel each other; therefore, the N^3- ion should be the large of the two.

Answer 2

Thank u so much for your help!