Fireworks Explained: The Chemistry of Dazzling Colors

Metal salts make colors—strontium for red, copper for blue, sodium for yellow, and barium for green.
Oxidizers like nitrates provide oxygen so the chemicals can burn brightly in midair.
Fuel components such as charcoal and sulfur power the explosive lift and burst.
Binders hold the mixture together in pellets called “stars” that ignite into colors.
High temperatures excite electrons in metal atoms, which release light at specific wavelengths.
Blue is tricky—copper compounds burn unstable, making deep blues harder to achieve.
Layered shells allow fireworks to explode in patterns like rings, hearts, or chrysanthemums.
Chlorine donors enhance brightness and color purity in many firework formulations.
Timing fuses control when shells burst, creating synchronized displays.
Modern fireworks use computer choreography, combining chemistry and tech for dazzling shows.