Which medals were awarded to Newlands and Seaborg for their work?

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

The telluric helix was given by

Briefly describe the contributions of various scientists to the development of the Periodic Table.

Which scientist used atomic volume as the basis for the periodic classification of elements?

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 .......... .