Question

How many periods and vertical columns are there in the long form of the periodic table?​

Answer 1

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Question 》》

How many periods and vertical columns are there in the long form of the periodic table?

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answer 》》

period =7

coloumns=18☺☺

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Answer 2

Hey Mate!!!

Here's your answer:

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7 periods and 18 groups

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Hope it did a little bit help to you ♡