Chemistry of Representative Elements — three ways to learn it.

The complete written lesson — periodic classification, the periodic trends & their reasons, the s-block (alkali & alkaline-earth metals), the p-block families & the first-member anomaly, hydrogen's position, the inert-pair effect, the diagonal relationship, and the Contact process for sulphuric acid.

As you scroll, a live D3 panel animates every idea: trend bars sweeping across a period, an alkali metal fizzing in water with its coloured flame, the p-block family cards, and an interactive Contact-process reactor where you set the conditions and watch the SO₃ yield shift.

Run the Contact process reactor yourself: set the temperature and watch the SO₃ yield rise or fall over a hot V₂O₅ catalyst bed.