Organic Chemistry

Carbon can bond to itself in chains, branches and rings, and that one talent produces millions of compounds, from petrol to perfume to DNA. Build carbon skeletons on screen, read the chemist's shorthand of zig-zag lines, then hunt down every isomer of a formula while the builder catches you drawing the same molecule twice. Learn to name what you build, recognise the functional groups that give molecules their personalities, count rings and double bonds from a formula alone, and meet benzene, the ring that broke the rules.