Question

According to Moseley's equation, which of the following element produces X- rays with maximum frequency?
(A)Na
(B) K
(C) Fe
(D) Pt​

Answer 1

Answer:

Henry Moseley discovered that the wavelength (energy) of an X-ray depended upon the nuclear charge of an atom. In 1913, working at the University of Manchester, he photographed the X-ray spectrum of 10 elements that occupied consecutive places in the periodic table

Answer 2

Answer:

(A) Na

Explanation:

It is so because wavelength of X-rays decrease in a regular manner on moving from lighter to heavier element and vice versa.

I hope this solves your doubt