Question

Metal which confirm abdomen interstellar covalent highlight of formula mx

Answer 1

Group 1 metal i.e. alkali metals can form stable covalent halides of the formula MX as they have low first ionization enthalpy but high second ionization enthalpy

But all the group 1 metals can form ionic halides except Li. Li shows covalent character due to its small size (in accordance with Fajan's rule)