Element
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Chemical base material which cannot be chemically converted
into simpler substances. Examples: oxygen, aluminium, iron, mercury,
lead, uranium. At present 118 different elements are known, some of
which do not occur in nature and were artificially generated: technetium,
promethium and all elements with a higher atomic number than that of
uranium.
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11 - 15 March 2018
Munich, Germany
30 September - 04 October 2018
Prague, Czech Republic |
