When the element barium is subjected to a flame test, it produces a yellowish-green flame. The element molybdenum also produces a yellowish-green flame, while other elements that produce several variations of green flames include boron, thallium, phosphorus, zinc, tellurium, antimony and lead.
The presence of barium can be detected through a flame test; carbonates and sulfates cause the colorful reaction. Barium is used in many fields including glass manufacturing, electronics and medicine; it is often used to make fireworks because of its bright, yellowish-green flame color. Barium itself is a soft, silvery-white metal with physical and chemical properties that resemble those of calcium.