The Latin Name of Mercury is Hydrargyrum that is why it's symbol
is Hg.
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in aqueous medium ppts. of copper iodide are formed which are
converted into cuprous iodide and free iodine in a short time. 2NaI
+ Cu(NO3)2 = CuI2 + 2NaNO3 2CuI2 = Cu2I2 + I2
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Latinized Greek: hydrargyrum, from "hydr-" meaning watery or runny and "argyros" meaning silver