1.

The radius of the innermost electron orbit of a hydrogen atom is 5.3 xx 10^(-11) m. What are the radii of the n = 2 and n = 3 orbits ?

Answer»

SOLUTION :As `r_(n)=n^(2)R`
`therefore r_(2)=4r_(1)=4xx5.3xx10^(-11)m=2.12 xx10^(-10)m`
and `r_(3)=9r_(1)=9xx5.3xx10^(-11)m=4.77xx10^(-10)m`


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