Question

Which of the following is not emitted by radioactive substance?

• A. Proton
• B. Positron
• C. $\alpha$-rays
• D. $\beta$-rays

Answer 1

Answer: (A)

Proton

Answer 2

Radioactive substances usually emit $\alpha$ -rays $\left({ }_{2}^{4} He\right.$ numbers $), \beta$ -ray (electrons) or $\gamma$ -rays or sometimes positrons $\left({ }_{1}^{0} \beta\right)$.