Mathematics, 22.11.2020 16:20 gulleraliyeva1999

The diagram shows an early version of the periodic table. The group of gases from the modern periodic table that is not represented in this table is group _. What is the missing number?

The diagram shows an early version of the periodic table. The group of gases from the modern period

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The diagram shows an early version of the periodic table. The group of gases from the modern periodi...