The speed of an electron in the inner mo...

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

`2.19 xx 10^(4) m.s^(-1)`

`2.19 xx 10^(6) m.s^(-1)`

`2.19 xx 10^(7) m.s^(-1)`

`2.19 xx 10^(8) m.s^(-1)`

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