ANSWER
Weaker than
EXPLANATION
There are four fundamental forces that occur in nature (in atoms):
=> Strong force
=> Electromagnetic force
=> Gravitational force
=> Weak force
Of all these forces, the strong force is the strongest.
This means that the electromagnetic force that acts on the protons in the nucleus of an atom is weaker than the strong nuclear force that acts on the same nucleus.
The answer is 'weaker than".
