A molecule with the formula ( AX ₄ Y ) has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is :

Step-by-step solution

Given A is rarest, monoatomic, non-radioactive p-block element and form ( AX ₄ Y ) type of molecule. ( ) It is concluded that it is Xe It is given the electronegativity of A is less than X & Y It is given the electronegativity of ( X ~ &~ Y ) is highest and second highest respectively among all element. ( X ~ &~ Y ) are ( F ~ &~ O ) ( ) Compound is consider as ( XeOF ₄ ) with square pyramidal shape.