Symbol, Name, Atomic Number, Atomic Mas, Energy Levels, Electrons
Atomic mass Atomic number Elemental symbol
chemical symbolatomic numberatomic massORSYMBOLWEIGHTCATTERGORY
The number of protons in an atom of the element.
Any Element found by mankind is on the Periodic Table.
Gallium corresponds to eka-aluminum on the modern periodic table.
All of them do.
Argon.
Atomic weight
This is the Russian chemist Dimitri Mendeleev.
The valency is 3+
Helium is located on the group 18 and period 1 on the modern periodic table.
Ir refers to iridium element that is placed in group-9 and period-6 in the modern periodic table.