Question

why are most carbon make covalent bond
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Answer 1

The carbon atom is very small due to which its outermost electrons are strongly held by the nucleus. So it is not possible to remove 4 electrons nor it is possible to gain 4 electrons. since carbon atoms achieve the inert gas electron arrangement only by sharing of electrons.therefore it forms covalent bonds.

Answer 2

Most carbon make covalent bond doue to its tetra valency

It cannot afford to lose 4 electrons and cannot sustain 4 more electrons

So it shares its electrons to form covalent bonds