How many valence electrons does boron have?

Answer:

Boron has three valence electrons.

Explanation:

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

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

Boron 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 boron.

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

The symbol of boron is B and the atomic number of boron is 5.So, it has five electrons totally.

Now do the electronic configuration of boron.

B(5) =1s2 2s2 2p1

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 2.So,the valence shell is the 2nd shell.

In 2nd shell we get 3 valence electrons.So each boron has 3 valence electrons.

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