Which statements are true regarding these two compounds? Check all that apply.

Acetone is made of nonmetal atoms sharing electrons, so it is covalent; sodium chloride consists of oppositely charged ions, so it is ionic. Solid sodium chloride does not conduct electricity well because its ions are held in place and cannot move freely, making B false. Covalent molecular compounds generally have weaker attractions between their molecules, so they tend to have low melting points; this makes C true.

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