cierra0 cierra0

17-10-2018
Physics

contestada

explain why periodic table t has two rows of period 6 and 7

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masseyana masseyana

22-10-2018

Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements. Periods 6 and 7 have 32 elements because the two bottom rows that are separated from the rest of the table belong to those periods.

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