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Group 1 Alkali Metals
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Group properties 1 valence electron Forms +1 cations
Most active metals Not found free in nature
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H Hydrogen Makes an acid an acid Lightest element known
All elements evolved from hydrogen by nuclear fusion. Flammable, see Hindenburg Protium, deuterium, and tritium
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Li Lithium Batteries Medication for bipolar disorder
LiOH used to filter CO2
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Na Sodium From Latin natrium Most common cation in the body
Works with potassium in the nerves and muscles Yellow street lights Significant in hypertension
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K Potassium From Latin kalium Bananas are a good source
Works with sodium in the nerves and muscles Too much can be fatal (KCl is one of the three lethal injection drugs)
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Rb Rubidium Cancer tracers Bose-Einstein Condensates
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Cs Cesium Generally accepted as the most reactive metal
Television picture tubes
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Fr Francium One of three elements named after the home of the Curies
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