The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 98
... molecule is described as being het- eropolar ( or simply polar ) . Polar and nonpolar molecules have different properties . Electrovalent bonding . Electrovalent bonding occurs when the electronegativity difference between two atoms ...
... molecule is described as being het- eropolar ( or simply polar ) . Polar and nonpolar molecules have different properties . Electrovalent bonding . Electrovalent bonding occurs when the electronegativity difference between two atoms ...
Page 111
... molecules as impurities . The degree of purity of any particular substance depends on the effort that is made to remove the last traces of im- purities , and the effort expended generally depends on the use to be made of the compound ...
... molecules as impurities . The degree of purity of any particular substance depends on the effort that is made to remove the last traces of im- purities , and the effort expended generally depends on the use to be made of the compound ...
Page 172
... molecules . From the information obtained it is possible to reason back , at least in part , to the structure of the original molecule . Various calorimeters are useful in determining the heat capacities of a given phase , the heat ...
... molecules . From the information obtained it is possible to reason back , at least in part , to the structure of the original molecule . Various calorimeters are useful in determining the heat capacities of a given phase , the heat ...
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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