The modern Periodic Table does not include information about density, first ionization energy, and
electron affinity.
The periodic table is arranged by atomic mass. Hydrogen is the lightest element. Its atomic mass is one.
Henry Moseley showed that atomic number is more fundamental property of an element than its atomic mass. It formed the base of modern periodic table.
There are 118 elements known and hence there are 118 boxes in the modern periodic table. Each box represent a given element.
Argon has 18 protons. Hence it is the 18th element in the modern periodic table. (The elements in the periodic table are arranged in the increasing order of their atomic number and repeating properties)
Atomic number on the basis of Modern periodic law as on the view of Henry Mosely
chemical symbolatomic numberatomic massORSYMBOLWEIGHTCATTERGORY
Symbol, Name, Atomic Number, Atomic Mas, Energy Levels, Electrons
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.
Atomic weight
Argon.
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.