Explain the reason for low melting and boiling point of a covalent compound

Explanation:

The low boiling point and melting point of a covalent compound is due to their mutual sharing of electrons and their directional property on bonding compared to ionic as their tendency to gain and loose lather than sharing

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.