Consider (again) the pf5molecule.
(a) what phosphorous atomic orbitals can enter into bonding with the fluorine atoms and how do they transform?
(b) consider the z-axis for each of the fluorines to be along the p-f bond, that is, the fluorine 2pzorbitals are the ones involved in bonding. what is the total, reducible representation corresponding to these orbitals?

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally