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CbColumbia Encyclopedia entry: Cb
Cb, formerly the symbol for the element columbium, now called niobium (Nb).
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Columbia Encyclopedia search results: Cb
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- columbium
Columbium, symbol Cb, former name of the chemical element niobium.
- niobium
Niobium, metallic chemical element; symbol Nb; at. no. 41; at. wt. 92.9064; m.p. about 2,468°C; b.p. 4,742°C; sp. gr. 8.57 at 20°C; valence +2, +3, +4, or +5. Niobium is a rare, soft, malleabl...
- radio
Radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially to the radio receiver. The prime...
