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1 Nitrogen family elements often form covalent compounds, usually with the oxidation numbers +3 or +5. 2  Nitrogen and phosphorus are nonmetals. 3  Arsenic and antimony are metalloids. 4  Bismuth is a metal.
Quick Answer. Phosphorus contains 15 protons. Protons, along with neutrons, are particles that make up the nucleus of an atom. Atoms also contain electrons, which neutralize the positive charge of protons. Continue Reading.