Question

How many atoms are in one body-centered cubic unit cell of a metal?

A) 1.
B) 2.
C) 3.
D) 4.

Answer 1

B) 2.

Step-by-step explanation:

They have 8 1/8 atoms on the edge that add to get 1 atom. Plus one whole atom inside. 1+1=2

Answer 2

Option B - 2

Step-by-step explanation:

In Crystal lattices, there are different types of unit cells namely;

- Hexagonal Closest Packed (HCP)

- Face Centred Cubic (FCC)

- Body Centred Cubic (BCC)

- Simple Centred Cubic (SC)

Now, each of them have a coordination number and also number of atoms per unit cell.

For this question, we are restricted to the body-centered cubic (bcc) unit cell which has a coordination number of 8 and contains 2 atoms per unit cell.