Answer :
In a 34S2-, the number of protons is 16, number of electrons is 18, and number of neutrons is 18.
Sulphur 34 is the stable isotope of sulfur. Sulfur has an atomic number of 16 and relative atomic mass of 34. Atomic number refers to the number of protons found in the nucleus of every atom of that element. Hence, the number of protons would be 16 for Sulphur 34. Atomic mass refers to number of protons and neutrons in the nucleus of the atom. Hence, the number of neutrons would be 18 for Sulfur 34. The number of electrons in a neutral atom is equal to the number of protons. However, in the give ion, 34S2- which is negatively charged to negative two implying that it has two extra electrons, hence the number of electrons is 18.
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