Group 17 halogens – color, state and oxidizing power

ChemistryInorganic ChemistryAges 15–16

Pick F₂, Cl₂, Br₂ or I₂ and drag the temperature slider: the vessel shows the element's real color and physical state at that melting/boiling point. Press Run reaction to let the halogen react with red-hot Fe, with H₂, or with NaCl, NaBr, NaI solution: the simulation shows whether the reaction happens, what conditions it needs, the chemical equation, and the resulting solution color. Students see oxidizing power decreasing F₂ > Cl₂ > Br₂ > I₂, and a stronger halogen displacing a weaker one from its salt.