Solid State Tes...

A metallic crystal crystallizes into a lattice containing a sequence of layers $$ABABAB$$.... Any packing of spheres leaves out voids in the lattice. What percentage by volume of this lattice is empty space ?

Calculate the density (in g cm$$^{-3}$$) of diamond from the fact that it has face-centered cubic structure with two atoms per lattice point and unit cell edge length of $$3.569\, \mathring A$$.

A metal crystallizes in bcc lattice. The percent fraction of edge length not covered by atom is :

A metal crystallizes into two cubic phases, face-centered cubic and body-centered cubic which have unit cell lengths as $$3.5\ \mathring A$$ and $$3.0\ \mathring {A} $$, respectively. Calculate the ratio of densities of fcc and bcc.

An element crystallizes in a structure having FCC unit cell of an edge length $$200$$ pm. Calculate the density (in g cm$$^{-3}$$) if $$200$$ g of this element contain $$5\, \times\, 10^{24}$$ atoms.

The $$\gamma$$-form of iron has fcc structure (edge length $$=386$$ pm) and $$\beta$$-form has bcc structure (edge length $$=290$$ pm). The ratio of density in $$\gamma$$-form to that in $$\beta$$-form is :

If the lattice parameter of Si is $$5.43$$ $$\mathring {A} $$ and the mass of Si atom is $$28.08 \times 1.66 \times 10^{-27}$$ kg, the density of silicon in kg m$$^{-3}$$ is:

An element has a FCC structure with edge length 200 pm. Calculate density if 200 g of this element contains $$24 \times 10^{23}$$ atoms.

Which of the following does not posses any plane of symmetry?