Caesium (Cs) in plasma
Caesium glows a diffuse pink-violet with no sharp ring. The heaviest stable alkali is also among the most reactive: the glass here is already clouding with deposit, which scatters the light and softens the torus into a haze.
Caesium glows a diffuse pink-violet with no sharp ring. The heaviest stable alkali is also among the most reactive: the glass here is already clouding with deposit, which scatters the light and softens the torus into a haze.
