The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 165
... bonds to contract , and ( 2 ) the electrons that constitute the carbon - carbon bonds do not lie along the direct lines between the centres of the carbon atoms , but rather they bulge outward in the plane of the ring , so that the actual ...
... bonds to contract , and ( 2 ) the electrons that constitute the carbon - carbon bonds do not lie along the direct lines between the centres of the carbon atoms , but rather they bulge outward in the plane of the ring , so that the actual ...
Page 167
... bonds , has all four atoms ( carbon and the three atoms attached to it ) in a single plane , with three equal bond ... Bonds with this symmetry are referred to as σ ( sigma ) bonds . The second electron pair , in order that it not occupy ...
... bonds , has all four atoms ( carbon and the three atoms attached to it ) in a single plane , with three equal bond ... Bonds with this symmetry are referred to as σ ( sigma ) bonds . The second electron pair , in order that it not occupy ...
Page 170
... bonds , as , for example : CH , CH = CH , HH Br2 , CH , C - CH alkali heat Br Br CH , C = CH ( + 2HBr ) . Reactions ... bonds separated by single bonds occur in fungi and higher plants ; an example is the substance CH3 - C = C - C = C ...
... bonds , as , for example : CH , CH = CH , HH Br2 , CH , C - CH alkali heat Br Br CH , C = CH ( + 2HBr ) . Reactions ... bonds separated by single bonds occur in fungi and higher plants ; an example is the substance CH3 - C = C - C = C ...
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andesite Antarctic antibodies antigen atoms basalt basin bonds carbon cause cells centimetres central centre century chemical composition crystals cultural cycle cyclone earth east economic effect eruption evaporation feet feldspar feldspathoids flow freezing gabbro glaciers groundwater humidity Hungarian Hungary hunting hydrocarbons hydrogen hydrograph hydrologic hydrologic cycle hypnosis ice sheets icebergs Iceland ideology igneous rocks Illinois immunoglobulin immunological important increase India Indian industry intrusive kilometres king known lakes land lava layers lymphocytes mafic magma major melting ment metres miles millimetres minerals molecules mountain natural northern occur ocean parasitic percent philosophy plagioclase political population precipitation pressure produced rainfall range reaction region relatively result Reykjavík river runoff Samkhya snow social soil square kilometres structure surface temperature theory tion ture types United vapour Vedānta volcanic western wind zone