To fulfill the octet rule, electron sharing leads to how many electrons around each atom? 4 5 7 8

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years