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BBC
1 年
Atoms, elements and compounds - AQA
It's important to use the names and chemical symbols for the first 20 elements in the periodic table, as well as the elements in groups 1 and 7.
Royal Society of Chemistry
6 个月
Development of the periodic table
Meyer's roots, however, were firmly in Germany. Meyer was just four years older than Mendeleev, and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, ...
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