The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 81
... contain both types of multiple bonds in the same molecule . Aromatic compounds are classed as benzenoid if they contain six - membered aro- matic rings , as in the parent compound benzene , or non- benzenoid if they do not . They are ...
... contain both types of multiple bonds in the same molecule . Aromatic compounds are classed as benzenoid if they contain six - membered aro- matic rings , as in the parent compound benzene , or non- benzenoid if they do not . They are ...
Page 202
... contain SiO2 in sufficient abundance to form quartz or other silica minerals in addition to the amounts of silica required to form all other mineral constituents that are present . Cor- respondingly , in this context undersaturated ...
... contain SiO2 in sufficient abundance to form quartz or other silica minerals in addition to the amounts of silica required to form all other mineral constituents that are present . Cor- respondingly , in this context undersaturated ...
Page 205
... contain concentric shells of feldspar fibres with or without accompanying quartz , tridymite , or glass . Spherulites occur mainly in glassy volcanic rocks ; they also are present in some partly or wholly crystal- line rocks that ...
... contain concentric shells of feldspar fibres with or without accompanying quartz , tridymite , or glass . Spherulites occur mainly in glassy volcanic rocks ; they also are present in some partly or wholly crystal- line rocks that ...
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activity amount antigen appear atoms become body bonds called cause central centre century common contain continued cover crystals cultural determined direct early east economic effect evaporation example fall feet Figure flow force glaciers Hungary hydrogen icebergs important income increase India individual industry internal Italy knowledge known lakes land later less major mass material means measure melting ment method metres miles minerals molecules natural North occur ocean organic origin percent period philosophy political population position present pressure produced range reaction regions relatively remains response result rise river rocks social soil structure supply surface temperature theory tion types United University usually various western wind