MCQ
"The properties of the elements are periodic function of their atomic numbers." The statement was given by :-
- AN. Bohr
- BJ.W. Dobereiner
- CD.I. Mendeleev
- ✓H.G.J. Moseley
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(Round off to the Nearest Integer).
[Atomic masses: $K : 39.0\, u ; O : 16.0 \,u ; H : 1.0\, u ]$