When a nucleus emits one –particle

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

When a nucleus emits one

\alpha

–particle, how are its mass number

A

and atomic number

Z

altered? (a)

A

decreases by 2,

Z

decreases by 2 (b)

A

decreases by 4,

Z

decreases by 2 (c)

A

remains unchanged,

Z

decreases by 2 (d)

A

decreases by 4,

Z

decreases by 1