Chemistry
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure

Magnesium
Lead
Bromine
Barium

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Chemistry
Table salt gets moist during rainy season because

Sodium chloride is deliquescent
Sodium chloride is hygroscopic
Sodium chloride contains hygroscopic impurities like magnesium chloride
Sodium chloride contains some quantity of sodium iodide

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