Question

BeCl2. Why is it covalent bond instead of ionic bond?
Beryllium is metal while chorine is non metal but why do they form covalent bond. And the iupac name is beryllium chloride or beryllium dichloride?

Answer 1

The stronger the polarizing power of the cation and the higher the polarisability of the anion the more covalent character is expected in a bond. The degree of polarization of an anion is favored by the charge density of the cation and the anion is polarized easily only if the cation has a small ionic radius such as Be has a charge of +2 or +3 the anion is large and the anion has a charge of -2 and -3.
What causes Distortion of the spherical shape of electron cloud of anion. The attraction of the positive charge on the cation.

Answer 2

We only use numeric prefixes with covalent not with ionic compounds.