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Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a ductile metal with very high thermal and...
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Potassium Appearance silvery gray Spectral lines of Potassium General properties Name , symbol , number potassium, K, 19 ...
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Lithium From Wikipedia, the free encyclopedia Jump to: navigation, search This article is about the chemical element. For other uses, see Li...
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Sodium From Wikipedia, the free encyclopedia Jump to: navigation, search neon ← sodium → magnesium Li ↑ Na ↓ K Element 1: Hydrogen (H), Othe...
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Caesium or cesium[note 1] is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting...
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Definition Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons . They are one of t...
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