alkalimetal

alkalimetal
alkali metal n.
Any of a group of soft, white, low-density, low-melting, highly reactive metallic elements, including lithium, sodium, potassium, rubidium, cesium, and francium.

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Universalium. 2010.

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  • Kalium — (kemisk symbol K, nummer 19 i periodesystemet, atommasse 39,102, naturlig forekomst ca 2,59%) er et såkaldt alkalimetal (alkalisk betyder basisk, dvs syreneutraliserende eller elektronafgivende). Kemisk set udviser kalium og alle andre… …   Danske encyklopædi

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