1.

In a hydrogen atom, the electron revolving in the fourth orbit, has angular momentum equal to

Answer»

H
`(h)/(pi)`
`(4h)/(pi)`
`(2h)/(pi)`

Solution :Angular momentum of an electron is an integral multiple of `(h)/(2PI)`
According to Bohr atom MODEL,
Angular momentum of an electron mvr = `(nh)/(2pi)`
`N = 4^(th)` orbit= `(4h)/(2pi)`
mvr = `(2h)/(pi)`


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