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Alkali metals Properties Flame colors over the Bunsen burner Application Video on How alkali metals reacts with water Chintal Desai Periodic table Lithium (Lithos) (Li) Crimson red flame It is the first member of the Alkali Metal family. Lithium is the lightest of all metals Application of Li It compounds are used in certain kinds of glass and porcelain products. More recently lithium has become important in dry-cell batteries and nuclear reactors. Some compounds of lithium have been used to treat manic depressives. Sodium (Natria) Na Sodium is perhaps the most characteristic alkali metal. Silvery white Golden yellow Reacts violently with water and rapidly with the oxygen in air. Soft enough to cut with a knife. It is the sixth most abundant element in the earth's crust. Application of Na Sodium in its elemental state it has been used as a molten coolant in nuclear reactors Is currently under research for sodium/sulfur batteries. Its most common compounds for industrial use include sodium chloride, sodium hydroxide (lye), sodium carbonate (washing soda) and sodium sulfate. Potassium (kalium ) K pale lavender The seventh most abundant element. Potassium is less dense than water Potassium reacts so violently with water that it bursts into flame Application of Potassium Important compounds of potassium include potassium hydroxide (KOH) (used in some drain cleaners), potassium superoxide, KO2,( used in respiratory equipment ) potassium nitrate, used in fertilizers and pyrotechnics. Like sodium ions, the presence of potassium ions in the body is essential for the correct function of many cells Rubidium (Latin: rubidius = red) Is similar in physical and chemical characteristics to potassium, but much more reactive. It is the seventeenth most abundant element. Its melting point is so low you could melt it in your hand if you had a fever (39oC). (Dangerous!!) Violet Application of Rb Rubidium was once thought to be quite rare but recent discoveries of large deposits indicate that there is plenty to use. However at present it finds only limited application in the manufacture of cathode ray tubes.
