Question

What is unusual about mercury?​

Answer 1

Explanation:

Mercury looks pretty, in its shiny, fast-moving liquid form, but don't touch! It can be extremely poisonous to humans. The symbol Hg that mercury is known by comes from its Greek name, hydrargyrum, which means "liquid silver" — to reflect its shiny surface. The element is also known as quicksilver for its mobility.

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Answer 2

Most extreme temperature fluctuations in the solar system even though mercury is the coldest planet to the sun its surface can still be extremely cold