PLEASE HELP ME PLEASE!!!!!!!!!

Elements of the same period (horizontal row) behave similarly.
TRUE
FALSE

The elements of the periodic table are put in order of:
electrons
atomic mass
atomic number
neutrons

What is the charge of a magnesium ion?
2+
2-
3+
4+

Which of the following pairs of atoms do NOT exhibit a covalent bond?
O and S
C and H
Sr and F
F and H

The Lewis structure of O2 has a double-bond.
TRUE
FALSE

The Lewis structure of HCl has a double-bond.
TRUE
FALSE