The New Encyclopædia Britannica in 30 Volumes: Macropædia : Knowledge in Depth. - 19 Bd, Volumes 1-19Encyclopædia Britannica, 1974 |
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Page 76
... elements — argon and potassium , cobalt and nickcontains a period of 2 elements , two periods of 8 ele- el , and tellurium and iodine — the first element of each ments , two periods of 18 elements , a period of 32 ele- pair has the ...
... elements — argon and potassium , cobalt and nickcontains a period of 2 elements , two periods of 8 ele- el , and tellurium and iodine — the first element of each ments , two periods of 18 elements , a period of 32 ele- pair has the ...
Page 77
... elements , which are closely similar in their properties to form of the periodic system of the elements , presented corresponding elements of the first and second long perihere in two forms , Figures 3 and 4 , contains all of the ods ...
... elements , which are closely similar in their properties to form of the periodic system of the elements , presented corresponding elements of the first and second long perihere in two forms , Figures 3 and 4 , contains all of the ods ...
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 configuration 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 configuration by gaining electrons ; the negative ionic valences of these elements ...
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