What is different between an ionic bond and a covalent bond?

Md Ariful Islam

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Md Ariful Islam

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Ionic bonds are bonds between two who has a large difference in . For instance Sodium chloride: $NaCl.$
Sodium have a low electronegativity and chloride have a very high electronegativity.

Covalent bonds are bonds between elements both with high electronegativity. For instance CO2. Oxygen have a high electronegativity and carbon have a electronegativity in approx the middle of the scale.

As a rule of thumb you can think of it as, the non metal elements forming molecules, for instance $NH_3$, $CO_2$ and so on, would form covalent bonds.
All metals (for the most) with a non metal forms an ionic bond: $MgCl_2$, $ZnO$ etc.

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