Question

The first element in the periodic table to have eight(8) valence/valency electrons on the third shell is

Answer 1

Answer:

The third shell will doesn't contain any valence electron because when we will do the electronic configuration of the element is :-

2,6

So , two shells can be filled .

Explanation:

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Answer 2

Answer:

Its Argon ( atomic no. 18)

Explanation:

as we know that valence electron means the electrons in outermost shell and it is given that there are three shells.

so, ATQ

Electronic configuration will be 2,8,8

And it is the atomic number of argon (18)