Group 1 of the periodic table of elements consists of hydrogen, and below it the six alkali metals: lithium, sodium, potassium, rubidium, cesium, and francium. The last three are extremely rare, and have little to do with everyday life; on the other hand, it is hard to spend a day without encountering at least one of the first three—particularly sodium, found in table salt. Along with potassium, sodium is an important component of the human diet, and in compounds with other substances, it has an almost endless array of uses. Lithium does not have as many applications, but to many people who have received it as a medication for bipolar disorder, it is quite literally a life-saver.

Also read article about Alkali Metals from Wikipedia

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Thanks for the information it really helped me with my AS physics coursework.
thanks this really helped me with my biochem project
very useful thank u very much. it helped with science coursework for yr11.
hi i am curently studdying the bohr modle of an atom but i do not understand how the bohr model of an atomic structure can be used to explain the reactivity of the alkali metals.

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