How many protons and neutrons does sulfur has of the net charge is -2?

Answer 1

S2- ion has 16 protons in the nucleus and 18 electrons around the nucleus.

The number of neutrons in the nucleus depends on the isotopic mass of the Sulphur ion because there are over 20 known Sulphur isotopes, which are the same element with different number of neutrons.

Answer 2

Sulfur has 16 protons. To determine the number of neutrons, we use the atomic number to find the Atomic Mass (32.06 g/mol for sulfur). If the charge is -2, it has gained 2 extra electrons (32 electrons total). Subtracting the number of protons (16) and electrons (32) gives us 16 neutrons.