Atom is the smaller particle of an element which contain all properties of element.
Atomic Radius is the distance of closest approach to another atom in a given bonding situation.
Balancing of Chemical Equations by Oxidation Number Method
Electronegativity is defined as the tendency of an atom to attract as the shared pair of Electrons towards itself an a Molecule.
Electronegativity is the property of bonded atom.
Oxidation Number of an Element in a compound is the total number of Electrons. It appears to have gained or lost when the bonding Electrons are transferred to the more Electronegative Atom.
The Electronegative, x is the ability of an atom of an elements to attract electrons towards itself in a shared pair of electrons.