Net charge of sulfide ion is (s2) explain how it obtains its charge

Atomic number of sulfur is 16. The electronic configuration of sulfur (S) can be written as . So, inorder to reach the stable octet configuration the valence shell tends to accept two electrons to form sulfide, a divalent anion.

This can be represented as,

Therefore, the charge on sulfide ion is -2 as sulfur atom tries to get a stable octet configuration by accepting two electrons giving a negative charge to the ion formed.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

c) should be the answer.