HI! Two questions!! 24 points and brainliest to whoever answers BOTH correctly first!

1. Use the following periodic table entry for Barium to answer the question below. There are neutrons in Barium-137.
81
56
137
112
2. Select all that apply.

The stability of atomic nuclei is related to the _____. (you can pick more then one)

ratio of protons to electrons
ratio of neutrons to protons
number of protons and neutrons
number of electrons