Question

What is the formula of a compound formed by imaginary atoms A and B. Atom A belongs to

group 2 and atom B is a non-metal with valency 2. (Explain the reason for your answer)​

Answer 1

Answer:

Correct option isB

AB2

Atom 'A' at FCC lattice points means number of atom A in unit cell is:

81×8+ 21×6=4.

If in a close-packed structure (ccp or fcc) there are 'n' atoms or ions then the number of tetrahedral voids will be 2n. Thus the number of atom B is =2×4=8

Thus the compound is A4B8 or AB2

Option B is correct