【】How Many Valence Electrons Does Lithium(Li) Have?||Number of Valence Electrons of Lithium

Lithium has one valence electron.

Explanation:

Now I am going to show you how many  valence electrons  lithium have in just 5 steps.

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             Step-1:

First, find the atomic number of lithium from periodic table.

From periodic table ,we see that the atomic number of lithium is 3.

                 Step-2:

We know that the atomic number of lithium is 3.So lithium has 3 protons and 3 electrons as the charge of electrons and protons are equal but opposite in nature.The charge of proton is +1 and the charge of electron is -1.

                Step-3:

Now write the electron configuration of lithium .

Li(3)=1s²2s¹

                Step-4:

Li(3)=1s²2s¹

Now we will find out valence shell of lithium from the electronic configuration of lithium.

Li(3)=1s²2s¹

Valence shell can be found from the highest number of principal quantum number.

You know that principal quantum number is expressed by n.

Li(3)=1s²2s¹

Here the highest value of n is 2.SoThe valence shell of lithium is 2s¹

                 Step-5

In this step,we will find out the valence electrons of lithium.

We have to bear in mind that the electrons of valence shell are called valence electrons.

Li(3)=1s²2s¹

          =[He]2s¹

From the above electron 

configuration 

of lithium,we see 

that lithium has 1

valence electron in its 

valence shell(2s¹).

So there is one valence electrons of lithium.

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