Gallium

A new element named gallium was discovered, displaying unique spectral lines and validating predictions made in the periodic table. This discovery firmly established Mendeleyev’s table, confirming it for subsequent scientific exploration.
Paul-Émile Lecoq de Boisbaudran France 1874
Gallium

A new element named gallium was discovered, displaying unique spectral lines and validating predictions made in the periodic table. This discovery firmly established Mendeleyev’s table, confirming it for subsequent scientific exploration.