Solid State Tes...

AAA type packing in 3D has a unit cell as :

The percentage of empty space in simple cubic unit cell:

A metallic element has simple cubic arrangement. The number of unit cells in 100 g of this metal $$(edge\ length\ = 288\ pm,\ density\ =\ 7.2\ g\ { cm }^{ -3 })\ are\ 5.8\times { 10 }^{ 23 }$$. The total number of atoms in 100 g of the metal is:

The packing fraction in 2-D square packing is equal to:

The coordination number of tetrahedral void:

If sodium metal crystallizes in body centered cubic lattice and unit cell of sodium has edge length of 4.29 $$A^0$$, then what is the radius of sodium?

The percentage of empty space and coordination number in the unit cell of simple cubic lattice is:

Which of the following correctly describes the structure of $$CaF_2$$ ?

Calcium metal crystallises in fcc lattice with edge length 556 pm. Calculate the density of metal.

Which of the following cannot be regarded as molecular solid?