Question

The particles not emitted by radioactive substances are:

• A. gamma rays
• B. electrons
• C. protons
• D. He nuclei

Answer 1

The correct option is C protons

$\bullet$gamma rays are emitted in $\gamma$-decay.

$\bullet$high energy electrons are emitted in $\beta$-decay.

$\bullet$$He$ nuclei are emitted in $\alpha$-decay.

$\bullet$Protons are not emitted in any of the radioactive decay processes.