【】How Many Valence Electrons Does Iodine(I) Have?||Number of Valence Electrons in Iodine(I)

How Many Valence Electrons Does Iodine(I) Have?

Answer:
Iodine has seven valence electrons.

Now we are going to know  how many  valence electrons  iodine  have in just 5 steps.

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             Step-1:

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

From periodic table ,we see that the atomic number of iodine is 53.

                 Step-2:

We know that the atomic number of iodine is 53.So iodine has 53 protons and 53 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 iodine .

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶5s²4d¹º5p⁵


Now rewrite this from low to high value of  n.

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶4d¹º5s²5p⁵

                Step-4:

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶4d¹º5s²5p⁵

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

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶4d¹º5s²5p⁵

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

You know that principal quantum number is expressed by n.

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶4d¹º5s²5p⁵

Here the highest value of n is 5.SoThe valence shell of iodine is 5s²5p⁵

                 Step-5

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

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

I(53)=1s²2s²2p⁶3s²3p⁶4s²
3d¹º4p⁶4d¹º5s²5p⁵

From the above electron 

configuration 

of iodine,we see 

that iodine has 7

valence electrons in its 

valence shell(5s²5p⁵).

So there are seven valence electrons of iodine.


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