What is crystal lattice or space lattice ? Give significance of lattice point.

Give the significance of a 'lattice point'.

Give the significance of a ' lattice point

If point P(x,y) is called a lattice point if x, y in I. Then the total number of lattice points in the interior of the circle x^2 + y^2 =a^2, a != 0 can not be:

What do you understand by the term space lattice and 'unit cell'?

If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semi conductor formation will occur

A_(2)B molecules (" molar mass " = 259.8 g//"ml") crystallises in a hexagonal lattice as shown in figure .The lattic constants were a=5 Å and b=8 Å . If denstiy of crystal is 5 g//cm^(3) then how many molecules are contained in given unit cell ? (" Use" N_(A) = 6xx10^(23))

State two characteristics of crystal lattice.