Are the properties of a compound are always the same as the properties of the elements in a compound?

Are the properties of a compound are always the same as the properties of the elements in a compound?
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Answer :

Not always. For example sodium (Na), a metal that reacts violently with water, and chlorine (Cl), a yellow poisonous gas, combine to make table salt, which has none of these properties. But in others cases there are some similarities, like in a metal alloy.
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