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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The correct statements for cubic close packed (ccp) three dimensional structure is(are ) (a) The number of the neraest neighbours of an atom present in the topmost layers is 12 (b) The efficiency of atom packing is 74%

The correct statements for cubic close packed (ccp) three dimensional structure is(are ) (a) The number of the neraest neighbours of an atom present in the topmost layers is 12 (b) The efficiency of atom packing is 74%

Sodium metal crystallizes in body Centedrd cubic lattice with a unit cell edge of 4.29 A. The radius of sodium atom is approximately