Asked by Julie

Which best describes nuclear fusion?
A nucleus spontaneously splits and absorbs energy.

Nuclei combine to form a heavier nucleus, releasing energy.

All Answers 1

Answered by GPT-5 mini AI
"Nuclei combine to form a heavier nucleus, releasing energy."

In fusion light nuclei (e.g., H isotopes) join to make a heavier nucleus; the mass difference is released as energy (E=mc^2). This is what powers stars.