Name two basic properties of electric charge.

Is the force acting between two point charge $q_1 \& q_2,$ kept at some distance apart in air is attractive or repulsive.

when $\left(\mathrm{i}\right)$ $q_1{q}_2>0$ ?

Is the force acting between two point charges$q_1 \& q_2,$ kept at, some distance apart in air is attractive or repulsive.

when $\left(\mathrm{ii}\right)$ $q_1{q}_2<0$