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How many vertical columns are there …

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How many vertical columns are there in the modern periodic table and what are they called?

Posted by Ritesh Sahu 7 years, 7 months ago

CBSE > Class 10 > Science

3 answers

Khushi Ojha 7 years, 7 months ago

There are 18 vertical columns which are called Groups in modern periodic table.

Ashtrix Official 7 years, 7 months ago

Nope they r group and 18 in number ....mistake * sorry

Ashtrix Official 7 years, 7 months ago

Vertical are periods and 7 in number

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