(i) What is meant by the term 'coordination number ?(ii)what is the corrdination number of atoms (a)in a cubic close packed structure ?(b)ina body-centred cubic structure ?

(i) What is meant by the term 'coordination number ?(ii)what is the co

1.	(i) What is meant by the term 'coordination number ?(ii)what is the corrdination number of atoms (a)in a cubic close packed structure ?(b)ina body-centred cubic structure ?
Answer» Solution :The coordination NUMBER of a constituent particle ( ATOM, ion or molecule) , in a crystal is the number of constituent particles which are the IMMEDIATE neighbours of that particle in the crystal. In ionic crystals, coordiantion number of an ion in the crystal is the number of oppositely CHARGED ions surrounding that particular ion. (ii) (a) 12 (b) 8