Sodium, Aluminum, Sulfur, Chlorine
Largest---------------------->Smallest
Sodium aluminum sulfur chlorine
Mendeleev arranged the elements according to their atomic weight and valence.
Mendeleev arranged the elements in the periodic table according to their atomic masses.
On the periodic table, the elements are arranged by Atomic Mass. Helium and Hydrgen are at the way top of the table due to how they have the smallest amount of mass. The elements with the biggest mass are at the bottom.
This is called the "Periodic Law" or "Principle of Periodicity".
He arranged the elements in the increasing order of their atomic masses and repeating periodic properties.
florine chlorine bromine iodine
a
Start with the largest and end with the smallest
need to arrange 5/8,1/2,4/11 in increasing order
Meneleev arranged the elements
The elements are arranged in what is called the periodic table.
The Periodic Table of Elements.
the rule defines whether we have to arrange in ascending order or the decreasing order as per demand
Atomic Mass.
F2+ most stable>f2>f2-
mendelev arranged the elements in the periodic table in the asending order of the mass number of elements.
Dmitri Mendeleev