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The increasing order (lowest first) for the value of `e//m ("charge" //"mass")` for electron(e), proton (p) neutron (n) and alpha particle `(alpha)` is

A

` e, p, n. alpha`

B

`n, alpha, p, e`

C

` n, p, e, alpha`

D

` n, p, alpha, e`

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The correct Answer is:
B
Charge on neutons is zero and mass of electron is minimum .
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P BAHADUR-ATOMIC STRUCTURE-Exercise 3A
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