Chemistry, asked by msmeenapriya, 10 months ago

How to find the elements placed in groups and periods

Answers

Answered by Anonymous

2

Explanation:

First take the Atomic number of the given element. ...

Then calculate the electronic configuration using the atomic number 2+8+7=17 therefore the electronic configuration will be 2, 8, 7.

Here we find that the no of valence electrons of element is 7 as the valence shell has 7 electrons.

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