1.

The speed of an electron in the inner most orbit of the hydrogen (Bohr radius = 52.9 pm, me = 9.11 xx 10^(-31) kg) is

Answer»

`2.19x10^(14)m.s^(-1)`
`2.19xx10^(6)m.s^(-1)`
`2.19xx10^(7)m.s^(-1)`
`2.19xx10^(8)m.s^(-1)`

ANSWER :B


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