Question

why is mercury a liquid at room temperature

Answer 1

Because of the behavior of the valence electrons,mercury has a low melting point, is a poor electrical and thermal conductor and doesn't form diatomicmercury molecules in the gas phase. The only other element on the periodic table that is a liquid at room temperature and pressure is the halogen bromine.4 days ago

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Answer 2

It has low melting point which is even low than that of room temperature. It's melting point is -38.83 °C and room temperature is about 20°C which is much higher compared to mercury's melting point which makes it to be liquid in room temperature.