In a cubic close packing of spheres in three dimensions, the co-ordination number of each sphere?

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Solution

The correct option is D 12
In cubic close packing the atoms are present at corners and face center of the unit cell.
As the atom present at face center touches $12$ atoms of face centers . $4$ in its plane , $8$ outside the plane..
hence the co- ordination number is $12$ .

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Similar questions

Q. In a cubic close packing of spheres in three dimensions, the co-ordination number of each sphere is:

Q. Match the types of packing given in column I with the items given in column II.

	Column I		Column II
(i)	Square close packing in two dimension	(p)	Triangular voids
(ii)	Hexagonal close packing in two dimensions	(q)	Pattern of spheres is repeated in every fourth layer
(iii)	Hexagonal close packing in three dimension	(r)	Coordination number=4
(iv)	Cubic close packing in three dimension	(s)	Pattern of spheres is repeated in alternate layers

Match the types of packing given in Column I with the items given in Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . S q u a r e c l o s e p a c k i n g i n t w o & 1. T r i a n g u l a r v o i d s d i m e n s i o n s B . H e x a g o n a l c l o s e p a c k i n g i n t w o & 2. P a t t e r n o f s p h e r e s i s r e p e a t e d d i m e n s i o n s & i n e v e r y f o u r t h l a y e r C . H e x a g o n a l c l o s e p a c k i n g i n & 3. C o o r d i n a t i o n n u m b e r = 4 t h r e e d i m e n s i o n s D . C u b i c c l o s e p a c k i n g i n t h r e e & 4. P a t t e r n o f s p h e r e i s r e p e a t e d i n d i m e n s i o n s & a l t e r n a t e l a y e r s \end{matrix}$

Q. In hexagonal close packing of sphere in three dimensions.

Q. Select the correct statement(s) related to hexagonal close packing of identical spheres in three dimensions.

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In a cubic close packing of spheres in three dimensions, the co-ordination number of each sphere?

The correct option is D 12In cubic close packing the atoms are present at corners and face center of the unit cell.As the atom present at face center touches 12 atoms of face centers . 4 in its plane , 8 outside the plane..hence the co- ordination number is 12.

The correct option is D 12
In cubic close packing the atoms are present at corners and face center of the unit cell.
As the atom present at face center touches $12$ atoms of face centers . $4$ in its plane , $8$ outside the plane..
hence the co- ordination number is $12$ .