Incandescent Light Bulb

We look at how an incandescent light bulb can be made. First we attach a tungsten wire to electrodes in a flask of air and pass a current through the wire. The wire glows briefly before burning and breaking. Next we fill the flask with the non-reactive, noble gas argon. This time the wire glows for a much longer time as the wire is heated without burning. Chemistry - Periodic Table - Learning Points. Metals conduct electricity when they are in a solid state; when they conduct electricity, solid metals heat up and glow due to electrical resistance. The oxygen in air is reactive and leads to combustion The noble gases are very unreactive. A Twig Experiment Film. Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.