Argon is a non reactive noble gas.
The central part of an atom is one which contains both protons and neutrons.
Polyatomic element is one which contains more than 3 atoms.
Particles which has no charge.
No. of atoms of sulphur that is required to form a sulphur molecule.
Diatomic molecule is one which contains two atoms.
Combining capacity of an atom.
Valency of sodium is 1.
Fundamental unit of matter.
The number of chlorine atoms required to form a chlorine molecule.
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