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Vanderwaal Radius

21 Radius of ...

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21 Radius of Ar atom is 145pm. The percentage volume occupied by an Ar atom at STP is

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A r

145

pm. The percentage volume occupied by an

A r

atom at STP is:

Q. The volume occupied by 1 mole atom of a diatomic gas at STP is:

Q. Assertion :20 g of argon (atomic mass of

A r = 40

) occupies volume of 22400

c m^{3}

at STP. Reason: 4 g of helium (atomic mass of

H e = 4

) occupies a volume of 22400

c m^{3}

Q. Assertion : 20 gm of argon (atomic mass of Ar

= 40)

occupies volume of

22400 c m^{3}

at STP.
Reason : 20 gm of Neon (atomic mass of

N e = 20

) occupies a volume of

22400 c m^{3}

Q. The atomic radius of metal crystallizing in fcc structure true is

1.25 A^{o}

. Hence the volume occupied by atoms in cell crystal is:

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Vanderwaal Radius

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