[】How Many Valence Electrons Does beryllium(Be) Have?||Number of Valence Electrons of beryllium(Be)

How Many Valence Electrons Does beryllium(Be) have?

Answer:

Beryllium has two valence electrons.

Explanation:

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

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             Step-1:

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

From periodic table ,we see that the atomic number of beryllium is 4.

                 Step-2:

We know that the atomic number of beryllium is 4.So beryllium has 4 protons and 4 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 beryllium .

Be(4)=1s²2s²

                Step-4:

Be(4)=1s²2s²

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

Be(4)=1s²2s²

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

You know that principal quantum number is expressed by n.

Be(4)=1s²2s²

Here the highest value of n is 2.SoThe valence shell of beryllium is 2s²

                 Step-5

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

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

Be(5)=1s²2s²

From the above electron 

configuration 

of beryllium,we see 

that beryllium has 2

valence electron in its 

valence shell(2s²).

So there are two valence electrons of beryllium.

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