Lec 05 unit cell density 12th Chemistry

Silver crystallises in a face-centred cubic unit cell. The density of Ag is 10.5 g cm^(-3) . Calculate the edge length of the unit cell.

Density of a unit cell is respresented as rho = (" Effective no. of atoms (s)" xx "Mass of a unit cell ")/("Volume of a unit cell ")=(Z.M)/(N_(A).a^(3)) where , mass of unit cell =mass of effectuive no . of atoms(s) or ion (s). M= At . mass// formula N_(A) = Avogadro' s no . rArr 6.0323 xx 10^(23) a= edge lemght of unit cell The density of KBr is 2.75 g //cm^(-3) . The length of the edge of the unit cell is 645 pm .To which type of cubic crystal , KBr belongs ?

analysis OF unit cell,density OF lattice

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) The number of atoms present in 100 g of a bcc crystal (density = 12.5 g cm^(-3)) having cell edge 200 pm is

Organic Chemistry पढ़ने का Best Trick | 12th Chemistry | Organic Chemistry | Important Topic in Board

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Analysis OF Unit Cells || Density OF Crystal Lattice

If the unit cell edge length of NaCl crystal is 600 pm, then the density will be