Year: 2020 October
Topic: Nuclei
Time :
1. What happens to themass number and atomic number of an element when it emits \(\gamma\) -radiation?
(1). Mass number decreases by four andatomic number decreases by two.
(2). Mass number and atomic numberremain unchanged.
(3). Mass number remains unchanged,while atomic number decreases byone.
(4). Mass number increases by four andatomic number increases by two.