Usually hard but brittle
Ionic or covalent

Ionic

Explanation:  Ionic compounds tend to be hard and brittle while covalent compounds tend to be softer and more flexible.

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the answer is true.

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.