Q- Explain how much portion of an atom located at (i) corner and (ii) body-centre of a cubic unit cell is part of its neighbouring unit cell.
Answer- (i) An Atom located in the corner of a cubic unit cell is basically shared between eight adjacent unit cells. Hence, One-eighth part of an atom is shared by a single unit cell. (ii) An atom located in the body centre of a cubic unit cell is not shared by the neighbouring unit cells. Hence, the atom only belongs to the unit cell in which it is present.
Important Questions for Class 12th
- Distinguish between: (i) Hexagonal and monoclinic unit cells and (ii) Face centred and end-centred unit cell
- A compound is formed by two elements M and N. The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids.
- A compound forms a Hexagonal close-packed structure what is the total number of voids in 0.5 mol of it
Help for you
What portion of an atom is located at corner?
The Atom that is located in the corner of a cubic unit cell is mainly shared between eight adjacent unit cells. So, the portion of an atom located at the corner will be 1/8th of its total.
How much part of any corner atom actually belongs to a particular unit cell?
In a cubic unit cell, the total part is divided between 8 atoms. These all are the corner atoms so, they contribute one-eighth part of the atom.