A) 82
B) 41
C) 20
D) 10
Correct Answer: B
Solution :
For \[{{K}_{\alpha }}\] X-ray line \[\frac{1}{{{\lambda }_{\alpha }}}=R{{(Z-1)}^{2}}\left[ \frac{1}{{{1}^{2}}}-\frac{1}{{{2}^{2}}} \right]=\frac{3R}{4}{{(Z-1)}^{2}}\] On putting the given values \[\frac{1}{0.76\times {{10}^{-10}}}=\frac{3}{4}\times 1.09\times {{10}^{7}}{{(Z-1)}^{2}}\] Þ \[{{(Z-1)}^{2}}\approx 1600\] Þ \[Z-1=40\] Þ \[Z=41\]You need to login to perform this action.
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