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For questions about chemical bonds (ionic/covalent/etc.), their properties (length, energy, angle, etc.) or their relation to other molecular properties (intermolecular forces/dipole moment/etc.). Do not confuse this tag with [lewis-structures], [dipole], [intermolecular-forces], etc.
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How is sulphur trioxide formed and why is it stable?
In the molecule, if each oxygen atom shares two electrons with sulfur atom then how does the sulfur atom remain stable?
Look at the structure of Xenon tetrafluoride $\ce{XeF4}$ and Xenon hexafluo …