Video
Hybridisation of carbon
A short video: how carbon forms sp, sp² and sp³ hybrids, and how they set the bond angles in organic molecules.
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Video
Why 4s Fills Before 3d (And Why It Flips!)
A short video: why we fill 4s before 3d but remove it first, and how to get every transition-metal ion right.
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Video
NO2 Dot-and-Cross: The Odd Electron
A short video: NO2 has an odd number of electrons, so one is left unpaired. See how to draw it, and why that makes NO2 a radical.
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Video
Solubility Explained: Like Dissolves Like
A short video: whether something dissolves is an energy question. Compare the solute, solvent and solute-solvent attractions to decide.
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Video
Dative (Coordinate) Bonds: Both Electrons From One Atom
A short video: what a dative bond is, how to draw it with a full arrow, and the key examples like NH4+ and Al2Cl6.
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