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(i) What is meant by the term ‘coordination number’?(ii) What is the coordination number of atoms:(a) in a cubic close-packed structure?(b) in a body-centered cubic structure? |
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Answer» (i) The coordination number of a constituent particles (atom, ion or molecule) in a crystal is the number of constituent particles which are the immediate neighbour of the particle in the crystal. In ionic crystals coordination number of an ion in the crystal is the number of oppositely charged ions surrounding that particular ion. (ii) (a) 12 (b) 8. |
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