Doesn't the color of metal burning tell what element it's made of? Brave AI:

Several metals produce a green flame when burned, primarily due to the emission of light at specific wavelengths as excited electrons return to lower energy levels. Copper is one of the most well-known metals that burns green, particularly in its +2 oxidation state (copper(II)), which produces a green flame. The green color can vary depending on the compound and oxidation state; for example, copper(II) non-halide compounds yield a green flame, while copper(II) halides produce a blue-green flame.

Boron also produces a bright green flame, which is characteristic of boric acid or borax when burned. Barium salts are another source of green flames, typically appearing as pale green, apple green, or yellow-green. Manganese(II) and molybdenum can also produce yellow-green flames. Thallium emits a pure green flame, and zinc compounds may produce a blue-green to pale green flame. In pyrotechnics, barium chloride (BaCl) is a common emitter for green light, with strong emission bands around 511–533 nm. The presence of chlorine in the compound can influence the color, as seen in copper(II) halides forming blue-green flames.

AI-generated answer. Please verify critical facts.