The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 76
... elements , two periods of 8 ele- ments , two periods of 18 elements , a period of 32 ele- ments , and an incomplete period . The elements in each period may be connected by tie lines with one or more corresponding elements in the ...
... elements , two periods of 8 ele- ments , two periods of 18 elements , a period of 32 ele- ments , and an incomplete period . The elements in each period may be connected by tie lines with one or more corresponding elements in the ...
Page 77
... elements , presented here in two forms , Figures 3 and 4 , contains all of the chemical elements that have been discovered or made ; they are arranged , in the order of their atomic numbers , in seven horizontal periods , with the ...
... elements , presented here in two forms , Figures 3 and 4 , contains all of the chemical elements that have been discovered or made ; they are arranged , in the order of their atomic numbers , in seven horizontal periods , with the ...
Page 80
... elements of the first groups are hence equal to the group numbers . The elements just preceding the noble gases can form negative ions with the noble - gas con- figuration by gaining electrons ; the negative ionic valences of these elements ...
... elements of the first groups are hence equal to the group numbers . The elements just preceding the noble gases can form negative ions with the noble - gas con- figuration by gaining electrons ; the negative ionic valences of these elements ...
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