Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Sulfur also has 16 electrons which are placed into three electron shells. First one has 2 electrons, the second one has 8 electrons, and the third has 6.

Atomic Number = 16

sulfur has 32 - 16 = 16 neutrons.

2 in the first electron shell,

8 in the second, and the remaining 6 in the third.

To gain a full 8 electrons in the third (outermost) electron shell, the sulfur atom can accept 2 electrons in an ionic bond

. Because hydrogen atoms can share one electron in a covalent bond