The term "nuclear bomb" refers to weapons that harness the power of nuclear reactions, either fission or fusion, to create an explosive force. The name reflects the fundamental process involved: the manipulation of atomic nuclei to release immense energy. The term "atomic bomb" is often used synonymously, particularly in reference to early fission weapons, but "nuclear bomb" is the more technically accurate and inclusive term.

Here's a more detailed explanation:

Atomic Bomb:

This term is often used to describe weapons that utilize nuclear fission, where the nucleus of an atom is split, releasing energy. The "atomic" part of the name refers to the atom, the basic unit of matter.

Nuclear Bomb:

This is a broader term that encompasses all types of weapons relying on nuclear reactions. It includes both fission weapons (atomic bombs) and thermonuclear weapons (which also involve nuclear fusion).

Why the shift?

While "atomic bomb" was the initial term, the development of more powerful weapons like hydrogen bombs (which utilize fusion) broadened the understanding of the underlying science. "Nuclear" became the more inclusive term to encompass both fission and fusion-based weapons.

(http://www.autoadmit.com/thread.php?thread_id=5745263&forum_id=2#49065897)

Atomic bomb--popping the electrons off an atom

Nuclear bomb--popping the parts of the nucleus apart into their constituent parts.

You need an atomic bomb to detonate a nuclear bomb.

(http://www.autoadmit.com/thread.php?thread_id=5745263&forum_id=2#49065905)

(http://www.autoadmit.com/thread.php?thread_id=5745263&forum_id=2#49067472)