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A MODERN table of chemical elements must show electronic configurations as well as the variation in the properties of the elements with atomic number. It should also include the lanthanide and ...

Creating mnemonic phrases can help you remember the order of elements, especially for the first 20 elements or specific groups. These phrases are general and are available on other free online sources ...

The history of the classification of the genus Carex from 370 B.C.--1955 A.D., including a synopsis of the etymology of the generic name Carex, is reviewed. The refinement of descriptive terminology ...

This is a preview. Log in through your library . Abstract Discussion focuses on the history of classification of the steles of vascular plants, from Jeffrey (1898) to the present. Recent stelar ...