A) Mass number decreases by 12 unit, atomic number decreases by 4 unit
B) Mass number decreases by 4 unit, atomic number decreases by 2 unit
C) Only mass number decreases
D) Only atomic number decreases
Correct Answer: B
Solution :
\[\alpha -\]particle is \[_{2}H{{e}^{4}}\].You need to login to perform this action.
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