Which are the only two elements on the periodic table that are liquid at room temperature?

A. Mercury and Bromine
B. Carbon and helium
C. Nitrogen and Hydrogen
D. Oxygen and Neon

Check Answer

The correct answer is A) Mercury and Bromine.

Mercury (Hg) is a silvery, dense liquid metal that is used in thermometers, barometers, and other scientific instruments. It has a melting point of -38.83°C and a boiling point of 356.73°C, making it the only metal that is liquid at room temperature.

Bromine (Br) is a reddish-brown liquid that is one of the halogens, a group of nonmetals that also includes fluorine, chlorine, and iodine. It has a melting point of -7.2°C and a boiling point of 58.8°C, which means it is a liquid over a wide range of temperatures, including room temperature. Bromine is used in the production of flame retardants, agricultural chemicals, and pharmaceuticals.
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