Question:
Number of atoms in bcc :
Number of atoms in bcc :
Updated On: Jun 18, 2022
- 1
- 2
- 3
- 4
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
The total number of lattice points or number atoms per unit cell for bcc is
$ 8\times \frac{1}{8} $ (from corners) $+ 1$ (from body centre) $= 2$
$ 8\times \frac{1}{8} $ (from corners) $+ 1$ (from body centre) $= 2$
Was this answer helpful?
0
0
Top Questions on Unit Cells
- Which of the following statements is incorrect for antibiotics?
- JEE Main - 2023
- Chemistry
- Unit Cells
- Which of the following expressions is correct in case of a CSCl unit cell (edge length, a) ?
- JEE Main - 2023
- Chemistry
- Unit Cells
- The correct option for the number of body centred unit cells in all $14$ types of Bravais lattice unit cells is :
- NEET (UG) - 2021
- Chemistry
- Unit Cells
- Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are:
- NEET (UG) - 2021
- Chemistry
- Unit Cells
- The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are, respectively :
- JEE Main - 2019
- Chemistry
- Unit Cells
View More Questions
Questions Asked in DUET exam
- A hammer of mass $200\, kg$ strikes a steel block of mass $200\, g$ with a velocity $8\, ms^{-1}$. If $23\%$ of the energy is utilized to heat the steel block, the rise in temperature of the block is (specific heat capacity of steel = $460 \; J \; kg^{-1} \; K^{-1}$)
- DUET - 2019
- specific heat capacity
- What is the shape and magnetic nature of permanganate ion ?
- DUET - 2019
- d -and f -Block Elements
- The mobility of charge carriers increases with
- DUET - 2011
- Electric Current
- Phagocytosis and pinocytosis are collectively termed as
- DUET - 2011
- Cell: the unit of life
- How many $ 1\,\mu F $ capacitors must be connected in parallel to store a charge of $1\, C$ with a potential of $110\, V$ across the capacitors?
- DUET - 2011
- electrostatic potential and capacitance
View More Questions
Concepts Used:
Unit Cells
The smallest portion of a crystal lattice which repeats in different directions to form the entire lattice is known as Unit cell.
The characteristics of a unit cell are:
- The dimensions are measured along the three edges, a, b and c. These edges can form different angles, they may be mutually perpendicular or may not.
- The angles held by the edges are α (between b and c) β (between a and c) and γ (between a and b).
Therefore, a unit cell is characterised by six parameters such as a, b, c and α, β, γ.
Types of Unit Cell:
Numerous unit cells together make a crystal lattice. Constituent particles like atoms, molecules are also present. Each lattice point is occupied by one such particle.
- Primitive Unit Cells: In a primitive unit cell constituent particles are present only on the corner positions of a unit cell.
- Centred Unit Cells: A centred unit cell contains one or more constituent particles which are present at positions besides the corners.
- Body-Centered Unit Cell: Such a unit cell contains one constituent particle (atom, molecule or ion) at its body-centre as well as its every corners.
- Face Centered Unit Cell: Such a unit cell contains one constituent particle present at the centre of each face, as well as its corners.
- End-Centred Unit Cells: In such a unit cell, one constituent particle is present at the centre of any two opposite faces, as well as its corners.