Question
Chemistry Question on Classification of elements & periodicity in properties
It is observed that characteristic X-ray spectra of elements show regularity When frequency to the power " n " ie vn of X-rays emitted is plotted against atomic number " Z ", following graph is obtained
A
2
B
3
C
1
D
21
Answer
21
Explanation
Solution
The correct answer is (D) : 21
According to Henry Moseley vαz−b
So n=21