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'alpha particle' of 3.6 MeV are fired to...

`'alpha` particle' of 3.6 MeV are fired toward nucleus `._(Z)^(A)X,` at point of closest separation distance between `'alpha`particle' and 'X' is `1.6xx10^(-14)m.` Calculate atomic number of 'X'.
`["Given":1/(4piepsilon_(0))=9xx10^(9) "in S.I.units"]`

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