Asked by: Mamadi Cantalejo
science chemistry

Why is Al2O3 a covalent character?

Last Updated: 27th March, 2021

According to his equation, Al2O3 is slightly nore ionic than covalent. The higher charges on Al and O make their bonding more covalent and with higher Coulombic attraction between the positive and negative ions those of a binary compound involving ions of lower charges (e.g. CaF2, NaCl).

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Hereof, why does Al form covalent bonds?

Instead they form covalent compounds. B and Al have strong forces of attraction whereas the other elements in 3rd group have weak attraction due to addition of extra shell. B and Al have high IE so they tend to form covalent bond rather than ionic bond because it cannot lose electrons.

One may also ask, what type of bond is Al2O3? Al2O3 is ionic due to relative size of oxygen and aluminium and polarizing power of Al, (since we know that aluminium has a charge of +3, provides three electrons) in case of Al2Cl6 & AlCl3 , it seems to be covalent due to similarities like banana bonding & bigger radius of Cl (in compression to oxygen).

Similarly, is aluminum oxide a covalent bond?

Aluminium oxide is an ionic compound, but aluminium chloride is only ionic in the solid state at low temperatures. At higher temperatures it becomes covalent. Covalent substances are molecular and usually have low melting and boiling points.

Is Al2O3 simple molecular?

Al2O3 is a solid with a three-dimensional structure and no molecule.

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