By Monica Halka
Scientists categorize the chemical parts as metals, nonmetals, and metalloids principally in response to the weather' skills to behavior electrical energy at basic temperatures and pressures, yet there are different differences taken into consideration while classifying the weather within the periodic desk. The alkali metals, for instance, are metals, yet have such specified homes that they're given their very own category. a similar is correct for the alkaline earths.
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Extra info for Alkali and Alkaline earth metals (Periodic Table of the Elements)
The Discovery and Naming of Alkali Metals Sodium and potassium salts were known to ancient people. For example, in the Hebrew story of Lot and his family fleeing the destruction of the cities of Sodom and Gomorrah (Genesis, chapter 19, verse Lithium is a soft, silvery-white, solid element. (Martyn F. . ” The symbol Na for sodium comes from the Latin name for sodium, natrium. The symbol K for potassium comes from its Latin name, kalium. In the first decade of the 1800s, Sir Humphrey Davy established himself as a careful experimenter in the field of electrochemistry.
Lithium hydroxide’s light weight and relatively low cost have recommended it over other alkali hydroxides, any of which could do the same job. Lithium hydroxide is water soluble, however, which is undesirable in situations where less care might be taken to keep it dry. The Toshiba company has been working on a lithium silicate absorption device that could turn out to be cost-effective for use in absorbing CO2 from car exhaust. The difficulty is in making a device small enough to fit in a typical automobile exhaust system.
Sodium azide (NaN3) is used as the source of nitrogen gas to inflate automobile air bags. Excitation of sodium atoms produces the yellow light seen in fireworks and street lamps. The subject of sodium atoms is found in much current scientific research. The transfer of angular momentum from laser light to particles was first accomplished in a small cloud of sodium atoms. Sodium metal has a very high reactivity (although it is not as reactive or as hazardous as potassium, rubidium, or cesium). An important use of the metal is to reduce the ores of less active metals to their neutral state.