Understanding Nuclear Forces and Reactions

What is the primary force that holds the nucleus together?

• Gravitational force

• Electromagnetic force

• Weak nuclear force

• Strong nuclear force

How does the Coulomb repulsion affect protons in a nucleus?

• It only affects neutrons

• It causes protons to repel each other

• It attracts protons to each other

• It has no effect on protons

Which element is considered the most tightly bound in terms of nuclear stability?

• Iron

• Uranium

• Hydrogen

• Helium

What happens to a heavy nucleus like uranium during fission?

• It loses electrons

• It remains unchanged

• It splits into smaller nuclei

• It combines with another nucleus

In nuclear reactions, what does Einstein's equation E=mc² describe?

• The charge of an electron

• The gravitational force

• The energy released from mass difference

• The speed of light