How many valence electrons does xenon have?

How many valence electrons does xenon have?

Answer:

Xenon has eight valence electrons.

Explanation:

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

The position of xenon in the periodic table is in group VIIIA.For main group elements,valence electrons are equal to the group number.So,xenon atom has eight valence electrons in its valence shell or outermost energy level.

Again, xenon is an element of group 18.Now just consider the unit place digit from group number.You are getting 8 which is equal to the number of valence electrons in xenon.

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

The symbol of xenon is Xe and the atomic number of xenon is 54.So,it has fifty four electrons totally.

Now write the electronic configuration of xenon.

Xe(54) =1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 5s2 5p6

=[Kr]4d10 5s2 5p6

             

[Tip: Complete filled d orbital is not considered as part of  valence shell or energy level]

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 5.So,the valence shell is the 5th shell or energy level.

In 5th shell,we get eight valence electrons.So each xenon has eight valence electrons.

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