According to Henry Moseley, which of the following properties of an element is a more fundamental property than its atomic mass?

Correct option is C

The correct answer is (C) Atomic number.

According to Henry Moseley, atomic number is a more fundamental property of an element than its atomic mass.

Explanation:

• Moseley was an English physicist who discovered that the atomic number of an element is a more fundamental property than its atomic mass.
•  He concluded this after studying the X-ray spectra of several elements and observing a linear correlation between atomic number and the frequency of X-rays emitted. 

Modern periodic table:

• The modern periodic table is based on Moseley's discovery and arranges elements in order of increasing atomic number. 
• This arrangement reveals that elements with similar properties recur after regular intervals, a phenomenon called periodicity. 

Atomic number:

• The atomic number is the number of protons or electrons in an atom of an element.