The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 108
... possible , but , with the alkane that has four carbon atoms , two different structures are possible . This suggests that two different compounds- with the same molecular formula , C4H10 , but with differ- ent structural formulas - are ...
... possible , but , with the alkane that has four carbon atoms , two different structures are possible . This suggests that two different compounds- with the same molecular formula , C4H10 , but with differ- ent structural formulas - are ...
Page 123
... possible chemical composition of a highly evolved star is a series of layers of different chemical composition . The central region would contain elements such as iron and nickel with layers of successively lighter elements surrounding ...
... possible chemical composition of a highly evolved star is a series of layers of different chemical composition . The central region would contain elements such as iron and nickel with layers of successively lighter elements surrounding ...
Page 163
... possible in principle but in practice takes place so slowly as to be ineffective . It is then necessary to investigate whether the rate can be in- creased to a practicable level by altering the conditions of the reaction - for example ...
... possible in principle but in practice takes place so slowly as to be ineffective . It is then necessary to investigate whether the rate can be in- creased to a practicable level by altering the conditions of the reaction - for example ...
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acid activity addition administration appear atoms became become bonds called carbon cause central centre century charge Charles chemical chemistry Chess China Chinese combined common complete compounds containing continued cultural drugs early economic effect electrons elements energy established example Figure forces four give given groups hydrogen important increased industry involved ions Italy king known land later less literature living major mass materials ment metal methods molecular molecules move natural occur officials orbitals organic original party percent period play political population position possible present properties provinces reaction region remained represented result river rule separation social species structure substances successful temperature tion types United usually various