How many valence electrons does indium have?

 How many valence electrons does indium have?

Answer:

Indium has three valence electrons.

Explanation:

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

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

Again, Indium is an element of group 13.Now just consider the unit place digit from group number.You are getting 3 which is equal to the number of valence electrons in Indium.

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

The symbol of Indium is In and the atomic number of Indium is 49.So,it has fourty nine electrons totally.

Now write the electronic configuration of Indium.

In(49) =1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 5s2 5p1

=[Kr]4d10 5s2 5p1

             

[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 three valence electrons.So each indium has three valence electrons.

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