Question

Which of the following is a type of nuclear decay that involves the emission of an alpha particle?

• A. Alpha decay
• B. Beta decay
• C. Gamma decay
• D. Neutron emission

Hint:

In alpha decay, the atom loses two protons and two neutrons, reducing its atomic number by 2.

Answer 1

The Correct Option is A

Alpha decay is a type of nuclear decay in which an unstable nucleus emits an alpha particle (consisting of two protons and two neutrons). This results in the formation of a new element. Beta decay involves the emission of electrons or positrons, and gamma decay involves the emission of gamma rays. Neutron emission is a separate type of decay.
Therefore, the correct answer is: \[ \boxed{(A) \, \text{Alpha decay}} \]