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

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

What is the importance of the Periodic Table?

Given below are two statements :
Statement $(I):$ According to the Law of Octaves,the elements were arranged in the increasing order of their atomic number.
Statement $(II) :$ Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers.
In the light of the above statements,choose the correct answer from the options given below :

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

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?