An electron in H-atom in M-shell on de-excitation to ground state gives.........spectrum lines.

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Solution

The correct option is B 3
When an electron returns from $n_{2}$ to $n_{1}$ state, the number of lines in the spectrum will be equal to
$\frac{(n_{2} - n_{1}) (n_{2} - n_{1} + 1)}{2}$ .
Here, no. of lines $3 (3 - 1) / 2 = 3$ . (For M, n is 3).

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An electron in H-atom in M-shell on de-excitation to ground state gives.........spectrum lines.

The correct option is B 3When an electron returns from n2 to n1 state, the number of lines in the spectrum will be equal to (n2−n1)(n2−n1+1)2.Here, no. of lines 3(3−1)/2=3. (For M, n is 3).

The correct option is B 3
When an electron returns from $n_{2}$ to $n_{1}$ state, the number of lines in the spectrum will be equal to
$\frac{(n_{2} - n_{1}) (n_{2} - n_{1} + 1)}{2}$ .
Here, no. of lines $3 (3 - 1) / 2 = 3$ . (For M, n is 3).