When a nucleus emits an alpha particle, its atomic mass

Question

When a nucleus emits an alpha particle, its atomic mass (A) decreases by 2 units (B) increases by 2 units (C) decreases by 4 units (D) increases by 4 units

Tardigrade Admin · Accepted Answer

When a nucleus emits an alpha particle, its atomic mass decreases by 4 units and atomic number by 2 units.

Q. When a nucleus emits an alpha particle, its atomic mass

decreases by 2 units

increases by 2 units

decreases by 4 units

increases by 4 units

When a nucleus emits an alpha particle, its atomic mass decreases by $4$ units and atomic number by $2$ units.