How many moles of argon are equal to 3.01×1023 atoms

To convert from atoms of argon to moles of argon, you need to divide by Avogadro's constant.

3.01*10^23 atoms *(1 mole/6.022*10^23 atoms) = 0.500 moles Ar

0.500 moles of Argon is equal to 3.01*10^23 atoms of Argon.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

16- counting by fours