A) \[3.2\times {{10}^{-19}}C\]
B) \[1.6\times {{10}^{-19}}C\]
C) \[4.8\times {{10}^{-19}}C\]
D) \[3.2\times {{10}^{-21}}C\]
Correct Answer: A
Solution :
As \[\alpha \]-particle is a helium nucleus, whose atomic number is 2 and mass number is 4. Hence, charge on an \[\alpha \]-particle is \[=2\times 1.6\times {{10}^{-19}}=3.2\times {{10}^{-19}}C\]
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