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Section V · 2 live · 6 on the bench

⚗ Chemistry

Atoms, bonds, and reactions — intuitive the moment they move.

Open now

No. 74sim States of matter Ice, water, and steam are the same molecule in three moods — and the mood is set by one number. Open the page → No. 76sim The pH scale Lemon juice is not five points worse than water. It is one hundred thousand times stronger. Open the page →

On the bench

Atoms & shellsMoleculesChemical bondsReactionsDiffusionGas laws