The wavelength of first line of the Lymen series for
hydrogen is 1210 Aº. The wavelength for the first
line of this series for a 10 time ionised sodium atom
(z = 11) will be :-
(1) 1000 A°
(2) 100 Aº
(3) 10 Aº
(4) 1 Aº
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Answer:
the answer is 10 a complete
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