<Tr> <Td> Li </Td> <Td> Lithium </Td> <Td> Lithium is a metal that is used to impart a red color to fireworks . Lithium carbonate, in particular, is a common colorant . </Td> </Tr> <Tr> <Td> Mg </Td> <Td> Magnesium </Td> <Td> Magnesium burns a very bright white, so it is used to add white sparks or improve the overall brilliance of a firework . </Td> </Tr> <Tr> <Td> Na </Td> <Td> Sodium </Td> <Td> Sodium imparts a gold or yellow color to fireworks, however, the color is often so bright that it frequently masks other, less intense colors . </Td> </Tr> <Tr> <Td> </Td> <Td> Oxygen </Td> <Td> Fireworks include oxidizers, which are substances that produce oxygen in order for burning to occur . The oxidizers are usually nitrates, chlorates, or perchlorates . Sometimes the same substance is used to provide oxygen and color . </Td> </Tr>

When did fireworks become part of bonfire night