Nonmetallic elements form ions by valence electrons to complete their outer shell. The valence electrons an element has in its outer shell, the easier it is to complete. The electron shells an element has, the easier it is to fill its outermost shell. Reactivity in nonmetals as you go from left to right in a group, and as you go from top to bottom.

Nonmetallic elements form ions by gaining valence electrons to complete their outer shell.

The more valence electrons an element has in its outer shell, the easier it is to complete.

The fewer electron shells an element has, the easier it is to fill its outermost shell.

Reactivity in nonmetals increases as you go from left to right in a group, and

decreases as you go from top to bottom.

Explanation:

the correct answer is:

a. formation of precipitation

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.