Question

Regarding the assertion and reason, choose the correct option.
Assertion [A]: Radioactive elements emit different types of radiations spontaneously.
Reason [R]: Radioactive elements are unstable and undergo radioactive decay, emitting radiations in the process.

• A. Both A and R are true and R explains A
• B. Both A and R are true, but R does not explain A
• C. A is true and R is false
• D. Both A and R are false

Answer 1

The correct option is A Both A and R are true and R explains A

Radioactive decay is the process by which unstable atomic nuclei breakdown to release energy in the form of radiations like alpha particles, beta particles and gamma radiations. These elements having unstable nucleus and emitting radiations spontaneously are known as radioactive elements.