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Write the number of vertical column in the periodic table. what are these columns called? |
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Answer» 18Elements in the modern\xa0periodic table\xa0are arranged in 7 periods and 18 groups. The\xa0number of vertical columns\xa0in the modern\xa0periodic table\xa0is 18.\xa0Vertical columns\xa0in the\xa0table\xa0are\xa0called\xa0groups. The\xa0number of vertical columbs\xa0in the modern\xa0periodic table is 18. And vertical column in the table are called groups |
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