how-does-the-emission-of-an-alpha-particle-affect-the-atomic-mass-and-atomic-num

Question

How does the emission of an alpha particle affect the atomic mass and atomic number of an element?

Accepted Answer

The atomic mass decreases by 4 and the atomic number decreases by 2.

Answer

The atomic mass and atomic number remain unchanged.

Answer

The atomic mass increases by 4 and the atomic number increases by 2.

Answer

The atomic mass decreases by 2 and the atomic number decreases by 4.