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Courses

Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.

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2 courses
Shapes of Molecules
Chemistry · High School (11–12) · Shapes of Molecules and Hybridisation
FreeCh 4 · 2/4

VSEPR theory and the shapes it predicts, with lone pairs that squeeze the angles; valence bond theory, sigma and pi bonds; and hybridisation from sp to sp3d2.

3Lessons10Problems2Python Labs1Question Set1Mock Test
StemPy LabStemPy Lab
Ionic and Covalent Bonds
Chemistry · High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and Hybridisation
FreeCh 4 · 1/4

The octet rule and Lewis structures, formal charge and its limits, the ionic bond and lattice enthalpy, and the bond length, angle, enthalpy and order that describe any bond.

3Lessons11Problems2Python Labs1Question Set1Mock Test
StemPy LabStemPy Lab
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