The Periodic Table organizes the elements by atomic number (number of nuclear protons).
Atomic mass was used to organize the earliest periodic table.
In a periodic table.
Periodic Table of Elements.
1869
A tool to organize the elements
Atomic Mass Octaves and Triads
Some people have suggested that Dmitri Mendeleev did first organize elements in a periodic table in a dream.
In 19th century , Mendeleev organised periodic table. He organised it in year 1869.
he based it on his favourite game
Atomic number
By grouping the elements on the Periodic Table.
Periodic Table of Elements.