"The properties of the elements are a periodic function of their atomic numbers." This statement was given by:

What was the basis for Mendeleev's classification of elements in his periodic table?

Given below are the atomic masses of the elements:

Element	$Li$	$Na$	$Cl$	$K$	$Ca$	$Br$	$Sr$	$I$	$Ba$
Atomic Mass $(g \cdot mol^{-1})$	$7$	$23$	$35.5$	$39$	$40$	$80$	$88$	$127$	$137$

Which of the following does not form a $Dobereiner's$ triad?

State whether the following statements are true or false:
$(i)$ The chart of elements presented by $Courtois$ could predict the stoichiometry of oxides of some metals.
$(ii)$ $Li, Na, Rb$ are known as $Döbereiner's$ triads.
$(iii)$ In $1863$,$Newlands$ classified the $56$ discovered elements into $18$ groups.
$(iv)$ $Mendeleev's$ periodic table is based on the atomic number of elements.

Who stated that the properties of elements are a periodic function of their atomic number?

Whose name is not associated with the development of the Periodic Table?