1.

An electron jumps from n^(th) level to 1^(st) level, the fact ( s) which is // are correct of H - atoms is // are

Answer»

Number of spectral lines `= ( N ( n - 1))/( 2)`
number of spectral lines `= Sigma ( n - 1)`
If n = 4, the number of spectral lines = 6
Number of spectral lines `= n ( n - 1) `

Answer :A,B,C


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