Write its complete chemical symbol including mass number, atomic number, and net charge (if any).

Answer;

16 protons means it is sulfur, S.  

Mass number 16 + 16 = 32  

18 - 16 = 2 excess electrons, so net charge = 2-

Explanation;

The atomic number of an atom is the number of protons.The atomic mass or the mass number is the sum of the protons and neutrons in an atomic nucleus. It determines the atomic mass of atoms.  

The net charge is the difference between the number of protons, which have positive charges, and electrons, which have negative charges.

The atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons.

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