five features of mendeleev periodic table
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Elements, with similar properties grouped together in periods (horizontal rows) and columns (vertical rows). ii) There are seven periods and eight columns. iii) Each column of first seven are subdivided into A and B subgroups. Eighth column contains three elements each in 4, 5 and 6 periods.
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Elements, with similar properties grouped together in periods (horizontal rows) and columns (vertical rows). ii) There are seven periods and eight columns. iii) Each column of first seven are subdivided into A and B subgroups. Eighth column contains three elements each in 4, 5 and 6 periods.
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