1.

The radius of the second Bohr orbit for hydrogen atom is (Planck's constant (h) - 6.6262 xx 10^(-34)Js, mass of electron = 9.1091 xx 10^(-31) kg, charge of electron (e) = 1.60210 xx 10^(-19)C, permitivity of vacuum (in_(0)) = 8.854185 xx 10^(-12) kg^(-1) m^(-3) A^(2))

Answer»

`1.65 Å`
`4.76 Å`
`0.529 Å`
`2.12 Å`

ANSWER :C


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