Manipal MET2012ChemistrySolid State
In a face-centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face-centre, one of A atom is missing from one corner in the unit cell. The simplest formula of the compound is
Options
- AA₂₄ B₇
- BA₇ B₄
- CA₇ B₂₄
- DA B₂
Correct answer
C. A₇ B₂₄
Step-by-step solution
No. of atoms of A from corners of unit cell = 7 8 No. of atoms of B from faces of unit cell =3 A: B= 7 8 : 3=7: 24 Thus, formula of the compound is A₇ B₂₄ .