What is unit cell ? Write formula to calculate the density of a unit cell.

An element having atomic mass 107.9 g mol^(-1) has FCC unit cell. The edge length of the unit cell is 486 pm. Calculate the density of the unit cell.

How will derive the formula of density of a unit cell ?

The formula for determination of density of unit cell is

The formula for determination of density of unit cell is

The formula for determination of density of unit cell is

Density of a unit cell is same as the density of the substance. If the density of the substance is known, number of atoms or dimensions of the unit cell can be calculated . The density of the unit cell is related to its mass(M), no. of atoms per unit cell (Z), edge length (a in cm) and Avogadro number N_A as : rho = (Z xx M)/(a^3 xx N_A) An element crystallizes in a structure having a fcc unit-cell an edge 100 pm. If 24 g of the element contains 24 xx 10^(23) atoms, the density is

Density of a unit cell is same as the density of the substance. If the density of the substance is known, number of atoms or dimensions of the unit cell can be calculated . The density of the unit cell is related to its mass(M), no. of atoms per unit cell (Z), edge length (a in cm) and Avogadro number N_A as : rho = (Z xx M)/(a^3 xx N_A) A metal X (at. mass = 60) has a body centred cubic crystal structure. The density of the metal is 4.2 g cm^(-3) . The volume of unit cell is