1.

The radius of second Bohr orbit for hydrogen atom is (h= 6.6262 xx 10^(-34)Js, mass of electron =9.1091 xx 10^(-31)kg, charge 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`

Solution :`r= (in_(0)n^(2)H^(2))/(pi m E^(2)z), 1 Å= 10^(-10)m`


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