Answer:
In a body-centered cubic (BCC) unit cell, there are 2 atoms in total, with 1 atom located at the corners of the cube and 1 atom located at the center of the cube. Therefore, there is 1 atom of tungsten (W) located at the center of the cube and 8 atoms located at the corners of the cube, but since the corner atoms are shared among adjacent unit cells, each corner atom contributes only 1/8th of its volume to the unit cell.
So, the number of tungsten atoms present in each unit cell is:
1 atom at the center + 8 atoms at corners x 1/8th contribution per atom = 1 + 1 = 2 atoms.
Therefore, there are 2 atoms of tungsten present in each body-centered cubic unit cell.
Step-by-step explanation: