How many valence electrons does hydrogen have ? 

Answer:

Hydrogen has one valence electron. 

Explanation:

Here is the way on how to find the valence electron for hydrogen.

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

The position of hydrogen in the periodic table  is in group 1A.For main group elements,valence electrons are equal to the group number.So a hydrogen atom has one valence electron in its valence shell.

Again, hydrogen is an element of group 1.Now just consider the unit place digit from group number.You are getting 1 which is equal to the number of valence electrons in hydrogen. 

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

The atomic number of hydrogen is 1.So it has one electron totally.

Now do the electronic configuration of carbon.

H(1) =1s1

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 1.So,the valence shell is the 1st shell.

In 1st shell, we get one valence electron.So  each hydrogen has one valence electron.

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