How many valence electrons does F have?

 Answer:

F has seven valence electrons.

Explanation:

To find out the number of valence electrons in a F atom,we need to look at the periodic table.

The position of F in the periodic table  is in group VIIA.For main group elements,valence electrons are equal to the group number.So,fluorine atom has seven valence electrons in its valence shell.

F is an element of group 17.Now just consider the unit place digit from group number.You are getting 7 which is equal to the number of valence electrons in fluorine.

Here is the another way to find out the valence electrons of F.

The symbol of fluorine is F and the atomic number of fluorine is 9.So, it has nine electrons totally.

Now write the electronic configuration of F.

F(9) =1s2 2s2 2p5

The valence shell is the outermost shell and the electrons that are present in valence shell is called valence electrons.

The valence shell or energy level can be identified by the highest value of principal quantum number ,n.Here the highest value of n is 2.So,the valence shell is the 2nd shell.

In 2nd shell we get 7 valence electrons.So each F has seven valence electrons.

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