Alkane and alkene molecules – 3D ball-and-stick models

Integrated ScienceChemical ReactionsAges 14–15

Ball-and-stick models of methane CH₄, ethane C₂H₆, propane C₃H₈ and ethylene C₂H₄ spin freely in space; drag to rotate them by hand. The side panel counts C–H bonds, single C–C bonds and double C=C bonds, shows the bond angle, the structural formula, and the balanced combustion equation (plus the bromine addition reaction for the alkene) so you can tell saturated and unsaturated hydrocarbons apart.