Question

1. the spontaneous emission of radiation by a nucleus is known as a. radioactivity b. half - life c. nuclear reactor d. nuclear fusion 10. a(n) is a high energy electron released from a nucleus during radioactiv

Explanation:

Radioactivity is the spontaneous emission of radiation by a nucleus. A half - life is the time required for half of the nuclei in a radioactive sample to decay. A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one while releasing energy. A high - energy electron released from a nucleus during radioactivity is a beta particle.

Answer:

1. a. radioactivity
2. beta particle