What are heavy metals? Heavy metals are a category of metallic chemical elements with relatively high density. They are known for being toxic when consumed. Examples are arsenic (As), cadmium (Cd), ...

Strontium carbonate (red), calcium chloride (orange), sodium nitrate (yellow), barium chloride (green) and copper chloride ...

If you’ve ever wondered how fireworks get their color, it all comes down to science, specifically metal salts. When fireworks ...