Question

What makes a nucleus unstable?

A. There are too few quarks to make the protons and neutrons.
B. The force of gravity on the mass in the nucleus makes it unstable.
C. The strong nuclear force doesn't balance the electrostatic force.
D. The attraction between protons and electrons pulls the nucleus
apart.
SUBMIT

Answer 1

Answer: the attraction between the protons and neutrons pulls the nucleus apart

Explanation: but also it is because of the fact that protons repel each other, and even though the neutrons hold the protons together in the nucleus, it has been theorized that eventually you will reach "critical mass" where you cannot make a nucleus any bigger, no matter how many neutrons you add.