Answer: I found the answer it is.
It is purely called the Atomic Mass
It is the periodic table
* if helped you in anyway please be sure to leave a thanks :)
Answer: a
Explanation:
Set up a ratio and solve.
7.9 • 120 / 160 = 5.925
Its an atom, or molecule, [in which] the complete amount of electrons isn't equal to the complete amount of protons. (Giving the atom/molecule a positive or negative electrical charge).
If this is incorrect- I'm sorry! ^^;