Question

why berlliyum doesn't form ionic bond ?
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Answer 1

Explanation:

Carbon has four valence electrons and to for am ionic compound, carbon should lose all the four electrons. This needs high ionisation energy and hence carbon generally shares electrons and forms covalent compounds .only carbon does form ionic compounds as in metal carbides.

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Answer 2

Answer:

Beryllium has quite a high electronegativity compared with the rest of the Group. That means that it attracts a bonding pair of electrons towards itself more strongly than magnesium and the rest do. In order for an ionic bond to form, the beryllium has to let go of its electrons.

The end result is that whereas lithium can form ionic bonds, beryllium cannot. But in the case of beryllium, the metal also pulls on the electrons reasonably strongly, resulting in a "stalemate": beryllium and chlorine decide to share the electrons, forming a covalent bond (this process is called polarization).

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