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

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

Explain the Law of Octaves given by Newland.

What is the periodic table according to Glenn $T$. Seaborg?

Fill in the blanks given below:
$(i)$ The first scientist to think about the properties of elements was ......... .
$(ii)$ The relationship of properties of elements suggested by Dobereiner is known as ........... .
$(iii)$ The Law of Octaves was proposed by the chemist ......... .
$(iv)$ The first periodic table was constructed by .......... and .......... .

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