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Throw some on the kitchen bench.

If it stays there, it's not a gas.

If it doesn't spread out into a thin film, it's not a liquid.

So....

Actually, standard table salt, or NaCl(Sodium Chloride), at room temperature is a solid. It can be melted which means it can become a liquid and release vapors which are gas. When NaCl melts the Na ions and Cl ions can separate.

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15y ago

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