Why Br2 and Hg are liquids at room temperature?

Answer 1

Like all liquids at room temperature they've got melting points (just or far) below room temperature, like water, benzene, alcohol, etc.

Answer 2

Br2 (Bromine) is a liquid at room temperature because it has a relatively high boiling point and weak intermolecular forces. This allows the atoms to move more freely, resulting in a liquid state. Hg (Mercury) is also a liquid at room temperature due to its low melting and boiling points, as well as weak intermolecular forces.