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Energy Band Diagrams

In NaCl the c...

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In NaCl the centers of two nearest like charged ion are present at a distance of.

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Q. How many effective

N a^{+}

C l^{-}

ions are present respectively, in a unit cell of

N a C l

solid if all ions along the line connecting opposite face centers are absent?

N a C l

N a^{+}

ions are present at:

C l^{-}

ions in the of NaCl lattice structure are present at:

Q. The energy released when a sodium ion and a chloride ion, originally at infinite distance are brought together to a distance of

2.76 ˚ A

, closest distance in

N a C l

crystal. Assume ions act as point charge and permitivity constant of the medium is

9 \times 10^{9} N m^{2} C^{- 2}

Q. Ions replace Na+ ions at the edge centers of NaCI lattice then the number of vacancies in

1

mole of NaCl be:

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