Chemistry, asked by badboy129, 9 months ago

how many groups and periods are there in modern periodic table ​

Answers

Answered by Anonymous
1

Answer:

heya mate ☺

18 groups

7 periods help u mate ✌

Answered by badboy12317
5

Explanation:

There are 18 vertical columns known as Groups

There are 7 horizontal rows known as periods

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