GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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H
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I
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Hg
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Be
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Detailed explanation-1: -Mercury is the only metal that is liquid at normal temperatures.
Detailed explanation-2: -Mercury is both a liquid at room temperature (as it has a very low melting point of-39C) and a metal. We tend to assume metals are all solids but they are not.
Detailed explanation-3: -Gallium is one of four metals that can be liquid near room temperature. The other elements are mercury, caesium and rubidium. Gallium has other unusual characteristics. Similar to water, the liquid form expands when it changes state to become a solid.
Detailed explanation-4: -Elemental or metallic mercury is a shiny, silver-white metal, historically referred to as quicksilver, and is liquid at room temperature.
Detailed explanation-5: -As stated in the question mercury is the only metal which is liquid at room temperature. It is because mercury is very bad at sharing its valence electrons. Most of the metals are hard and have a high melting point. This is because they readily share their valence electrons with the neighbouring atom.