Solid State Tes...

A crystal lattice is a periodic structure in

The neon atoms has a radius of $$160\,pm.$$ What is the edge of the unit cell of a face centered structured of neon ?

Which of the following has the smallest packing efficiency for atoms of a single type ?

The numbers of tetrahedral and octahedral holes in a hexagonal primitive unit cell are :

The number of atoms present in a hexagonal close-packed unit cell is :

The unit cell present in ABCABC, closest packing of atoms is :

Ferrous oxide has a cubic structure and edge length of the unit cell is $$5.0 \,\mathring {A}.$$ Assuming the density of ferrous oxide to be $$3.84 \,g/cm^3,$$ the no. of $$Fe^{2+}$$ and $$O^{2-}$$ ions present in each unit cell be : $$(use : N_{A} = 6 \times 10^{23})$$ :

In the close packing of atoms, there are :

The unit cell present in ABAB, closest packing of atoms is :

Graphite has h.c.p. arrangements of carbon atoms and the parallel planes are $$3.35 \,\mathring {A}$$ apart. Determine density of graphite: