Question

If P particles are present in FCC arrangement and Q particles are present at edge centre and body centre,

formula of compound is​

Answer 1

Answer:

hello there here is your ans.

Explanation:

It is also given that the atoms of P are present at the body-centre. Hence, the formula of the compound is PQ. The coordination number of both P and Q is 8

Answer 2

Answer:

The formula of the compound is PQ

Explanation:

For P particles

• In an FCC unit cell, eight atoms are found on the corner
• Each corner is shared by 8 unit cells
• So each corner atom contributes 1/8 of an atom
• The net contribution of the 8 corner atoms is 1/8 x 8 = 1
• In an FCC unit cell, six atoms are found on each face of the cube
• Each face of the cube is shared by 2 unit cells
• So each face centre atom contributes 1/2 of an atom
• The net contribution of the six face centre atoms is 1/2 x 6 = 3
• The net contribution of atoms in FCC arrangement is 1+3= 4

The number of P atoms is 4

For Q particles

• There are 12 edges in a cube
• Each edge centre is shared by 4 unit cells
• Each edge-centred particle contributes 1/4 of an atom
• The net contribution of 12 edge-centred particles is 1/4 x 12 = 3
• There is one body centre in a cube
• The body centre is not shared with other unit cells, there is only one per unit cell
• The net contribution of the body-centred particle is 1
• The net contribution of Q particles is 1+3 = 4 atoms

The number of Q atoms is 4

The ratio of P:Q particles is 4:4 = 1:1

So, the formula of the compound is PQ

#SPJ3