00:01
Hello everyone here in the a part the coordination number first we have bcc dc dc and hc p .c p .c.
00:28
So the coordination number it will be 12, 12 and 18.
00:37
So this is the answer for the a part.
00:41
Now in the b part for bcc, we know that number of atoms in bcc it is by 1 divided by 8 plus 1 so it is 2 atoms so each carbon atoms it contribute 1 divided by 8th part of atom so 8 corners atom 8 corners atom it contribute 8 multiplied by 1 divided by 8 which is 1 atom and 1 atom in the center of the unit so the total number of atoms is 8 divided by 1 divided by 8 plus 1 .2 atoms is the answer.
01:33
Whereas for hcp, we have 12 corner atoms, 2 phase atoms and 3 atoms inside.
02:01
So 1 corner atom contribute 1 divided by 6.
02:11
So 12 corner atoms, it will contribute, 12 multiplied by 1 divided by 6, which is 2 atoms.
02:26
So the number of atoms in hexagonal is 12 multiplied by 1 divided by 6 plus 2 multiplied by 1 divided by 2 plus 3 multiplied by 1, which is 6 atoms...