Question

unit exam - ionic compounds and metals
if two atoms get too close, what will their nuclei (plural of nucleus) do?
they will repel each other.
they will attract each other.
they will not do anything.

Explanation:

Nuclei of atoms contain protons which are positively - charged. According to the principle of like - charges repelling each other, when two nuclei get too close, the positive charges in them cause a repulsive force.

Answer:

They will repel each other.