Question

Nicknamed quicksilver, which of the following metallic elements is the only one that remains in a liquid state at room temperature? It is employed in thermometers due to its regular expansion upon heating and is also utilized in barometers owing to its high density. Despite its practical applications, it is classified as a toxic "heavy" metal.

Options:
A) Lithium - Li
B) Mercury - Hg
C) Iron - Fe
D) Gold - Au

Answer 1

Mercury (Hg), also known as quicksilver, is the only metallic element that is in a liquid state at room temperature and is known for its use in thermometers and barometers.

Step-by-step explanation:

Nicknamed quicksilver, the metallic element that remains in a liquid state at room temperature and is employed in thermometers and barometers due to its unique properties is Mercury - Hg. Mercury, unlike most metals which are solid at room temperature, is the only metal that is a liquid at these conditions. Its use in various devices comes from its consistent expansion upon heating and high density. However, due to its toxicity, mercury is classified as a toxic "heavy" metal and should be handled with care.