A beam of specific kind of particles of ...

A beam of specific kind of particles of velocity `2.1 xx 10^7 m//s` is scattered by a gold `(Z = 79)` nuclei. Find out specific charge (charge/mass) of this particle if the distance of closest approach is `2.5 xx 10^-14 m`.

`4.84xx10^(7)` C/kg

`4.84xx10^(-7)` C/kg

`2.42xx10^(7)` C/kg

`3xx10^(-12)` C/kg

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