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Mole Number/Avogardo number

The number of particles in 1 mole is known as mole number . The number is 6.023×10^23 .This number is called Avogardo number .

ELECTRONEGATIVITY

Electronegativity It is a withdrawing capacity of bonded atom within a molecule.

Upper part of soil highly acidic in nature

Upper part of soil contain most of non metallic oxide. e.g ,Co2,Sio2 etc.