Predict which of the following will form anions and which will form cations

(a) Predict which of the following will form anions and which will form cations.
(i) Na (ii) Al (iii) Cl (iv) O (b) Name two elements that are inert.

(a) Cl and O will form anions. Na and Al will form cations.
(b) He and Ne are inert elements