The periodic classification of elements is an arrangement of the elements in order of their
A
Atomic Weights
B
Isotopic Weights
C
Molecular Weights
D
Atomic Numbers
E
Atomic Masses
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Henry Moseley arranged the elements in the periodic table by their atomic number and this gave rise to the statement of the modern periodic law
Source: Myschool Past Questions Archive (Record #5)