C₂H₂ forms ______________ bonds.

___________ orbits are capable of forming 'Pi' bonds.

PCI₅ has _____________ structure .

 Px, Py, Pz orbitals are __________ to each other.

Br_2,Cl_2,etc are called __________ molecules.

Co-ordinate covalent bond is designated as ______________.

In ____________ covalent bond formation one atom contribute two electrons and the other atom contributes no electron.

The filling up of valence orbitals with 8 electrons is referred to as ___________ configuration.

Complete transfer of one or more electrons from one atom to another occurs in ___________ bonds.

The energy of stable molecules is _______________ the combined energies of the individual atoms present in the molecule .