what is covalent bonds?
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What is a covalent bond?
A chemical bond formed between atoms by sharing of electrons is called as covalent bond.
↬Also called as molecular bond.
Types of covalent bonds:-
- Single bond.
- Double bond.
- Triple bond
How are they formed?
↬Elements with very high ionisation energies do not transfer electrons & elements with very low electron affinity cannot take up electrons.
↬The atoms of those elements tend to share their electrons with the atoms of other elements or with other atoms of the same element.
↬In this way both the atoms obtain octet configuration in their valence shell and achieve stability.
Some properties of covalent bond:-
- Compounds having covalent bonds exhibit low melting points & boiling points.
- Lower enthalpies of vaporization and fusion.
- Compounds formed by covalent bonding don’t conduct electricity.(lack of free electrons. )
- Covalent compounds are not soluble in water.
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