It should be noted that sodium is present as an impurity in many if not most metal salts. A homemade atomizer was used to form a fine spray of the solution, which was sprayed directly into the burner flame. In these video sequences selected compounds, mostly metal salts, show the flame color in a Meeker burner flame. Some metal salts give off light outside of the visible region of the electromagnetic spectrum. Several metal salts give off a characteristic color visible to the human eye as is demonstrated by the alkali metals and a few other elements, but a fair number of metal salts give off light that may be observed, but is not sufficiently different in color to be differentiated from other metal salts. Upon returning to the ground state, they give off light (a line spectrum) characteristic of that metal. Metal ions combine with electrons in the flame and the metal atoms are raised to excited states because of the high flame temperature. Metal salts introduced into a flame give off light characteristic of the metal. These movies are 3 to 5 seconds in length. Aluminum chloride or magnesium chloride can be used to demonstrate that chlorine imparts no color to the flame. Except for boric acid, all compounds are chlorides. As you can imagine this colour change due to the presence of water is. Cobalt can also colour glass green, while the hydrated form of cobalt chloride is a beautiful deep rose colour. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
NOTE: Be sure to keep the strips sealed tightly in the vial, as exposure. Element Cobalt (Co), Group 9, Atomic Number 27, d-block, Mass 58.933. The flame colors are demonstrated close up. If moisture is present, the test paper will turn from blue to a light pink/white color. Aqueous solutions of various compounds are sprayed into a Meeker burner flame from an atomizer.
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