Chemistry, asked by anitajaiswal5569, 7 months ago

The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 1st group and the 4th period?
A) 21 B) 17 C) 19 D) 9

Answers

Answered by Bhavya5161

0

Answer:

I think it option B

I hope it will be helpful

Answered by manu9035

8

Answer:

A .21

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