The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 85
... four bonds from a carbon atom were directed from the central nucleus to the four corners of a regular tetra- hedron , in order to explain why molecules having four different groups attached to the same carbon atom had isomers . It was ...
... four bonds from a carbon atom were directed from the central nucleus to the four corners of a regular tetra- hedron , in order to explain why molecules having four different groups attached to the same carbon atom had isomers . It was ...
Page 552
... four ages of the world in which each age of 3,000 years ' length was divided into three millennia . Ahura Mazda ( the Wise Lord ) , symbolized by light and later called Ormazd , dwelt in infinite time with Ahriman , symbolized by ...
... four ages of the world in which each age of 3,000 years ' length was divided into three millennia . Ahura Mazda ( the Wise Lord ) , symbolized by light and later called Ormazd , dwelt in infinite time with Ahriman , symbolized by ...
Page 950
... four colours are needed in order to colour the regions so that two regions that share a com- mon boundary are always coloured differently , and in certain cases that at least four colours are necessary . ( Re- gions that meet only at a ...
... four colours are needed in order to colour the regions so that two regions that share a com- mon boundary are always coloured differently , and in certain cases that at least four colours are necessary . ( Re- gions that meet only at a ...
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Common terms and phrases
acid activity administration ammonia army atomic orbitals became benzene bonds Buddhist called carbon atoms cells central centre Ceylon Ch'in Chaetognatha Charadriiformes Charles Chaucer chemical bond chemical reactions chemistry chemoreception Chess Chicago children's literature Chile China Chinese chloride Chou common complex compounds covalent covalent bonds cultural disease drugs dynasty early economic electrons elements emperor energy example fluorine groups hydrogen important increased industry insects involved ions isotopes king known land large number Lo-yang major mass materials ment metal methods molecular molecules nitrogen northern nuclei occur officials orbitals organic oxide oxygen party percent period political population provinces quartets reactants receptors region reign result river separation Shang shell Sinhalese social sodium sodium chloride solution southern species structure substances sulfonamide sulfur sulfuric acid Szechwan T'ang Taoist temperature tion Tsung turtles Yangtze