Question

What will be the no of fluorine atomic no 9 and chlorine atomic number 17

Answer 1

Sorry, your question is improper.

I will explain some basics about the representation and the atomic numbers of elements chlorine and fluorine.

Atomic number of fluorine is 9 and that of chlorine is 17.

Both fluorine and chlorine are halogens.

They have one electron less than the noble gas electronic configuration, so they are highly reactive.

They are present in the second last group of the periodic table. That is group number 17.

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