Atoms per surface area in plane (100) for lead havinf fcc structure?
Answers
When metal Ti is heated in halogen X2, a Compound MXn is formed. In a given experiment, 1.00 g of Ti reacts with chlorine to give 3.22g compound. What is the corresponding value of n? (Ti= 47.9)
The area of the square region of the (100) plane within the unit cell is A100=a × a =a²
For the (100) plane, there are 4 atoms at the 4 corners and one atom in the middle. One fourth of each corner atom is enclosed within the unit cell, and middle atom is entirely within the unit cell, so the number of atoms on the (100) plane within the unit cell is N100 = 4 × (1/4) + 1 × 1 = 2.
) plane, there are 4 atoms at the 4 corners and one atom in the middle. One fourth of each corner atom is enclosed within the unit cell, and middle atom is entirely within the unit cell, so the number of atoms on the (100) plane within the unit cell is N100 = 4 × (1/4) + 1 × 1 = 2.
) plane, there are 4 atoms at the 4 corners and one atom in the middle. One fourth of each corner atom is enclosed within the unit cell, and middle atom is entirely within the unit cell, so the number of atoms on the (100) plane within the unit cell is N100 = 4 × (1/4) + 1 × 1 = 2. The BCC cubic has two atoms per cubic unit cell (1/8 of an atom at each of the 8 corners+1 atom in the middle=2 atoms=1).
Correct answer : 1/ a*a