A molecule with the formula has all its elements from the p-block. Element A is the rarest, monoatomic, non-radioactive member of its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have the first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is:
- A
Square pyramidal
- B
Octahedral
- C
Trigonal bipyramidal
- D
Pentagonal planar