Choose the correct options for the following questions.
When $\gamma-radiations$ is emitted by an excited nucleus, both of its charge number and mass number
Difficulty: Easy
A:
Increase
B:
Decrease
C:
Remain unchanged
D:
Both a and b
When an $\alpha-particle$ is emitted by certain nucleus, the charge number of the nucleus:
Difficulty: Easy
A:
Decreases by four
B:
Decreases ny two
C:
Remains unchanged
D:
Increases by two
When thorium nucleus emits an $\beta-particle$, the daughter nucleus is called:
Difficulty: Easy
A:
Protactinium
B:
Actinium
C:
Uranium
D:
Radium
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