solid at room temperature. liquid at room temperature. lighter than all other metals. heavier than all other metals.
I gave my students this multiple choice question: According to the Periodic Table of the Elements, mercury (Hg) is different from other metals because mercury is

Only one answer is correct among these 4 choices:
- solid at room temperature.
- liquid at room temperature.
- lighter than all other metals.
- heavier than all other metals.

Could you tell me which one is correct?

liquid at room temperature.