Which is the process by which a gas changes to a solid? deposition
evaporation
freezing
sublimation

Deposition

Explanation:

I know this is correct because i just took the test JDHSGVDK

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.