What will be the formula of '$M$' nitrate based on the given Lothar Meyer curve?

What were the important contributions of Mendeleev's periodic table?

The modern periodic table,based on the experiment of atomic number which highlights the significance of atomic number,is associated with:

Explain the contribution of Newlands to the periodic table.

Write a note on the genesis of the periodic table.

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.