If radio active nuclei emits β-particle, then mass-number:
A. increased by 1 unit
B. decreases by 1 unit
C. increases by 2 unit
D. decreases by 2 unit
Answer:A
If radio active nuclei emits β-particle, then mass-number:
A. increased by 1 unit B. decreases by 1 unit C. increases by 2 unit D. decreases by 2 unit