How many valence electrons does Cl have?
Answer:
Chlorine has seven valence electrons.
To find out the number of valence electrons in a Cl atom,we need to look at the periodic table.
The position of chlorine in the periodic table is in group VIIA.For main group elements,valence electrons are equal to the group number.So,Cl atom has seven valence electrons in its valence shell.
Cl is an element of group 17.Now just consider the unit place digit from group number.You are getting 7 which is equal to the number of valence electrons in chlorine.
Here is the another way to find out the valence electrons of chlorine.
The symbol of chlorine is Cl and the atomic number of chlorine is 17.So,it has seventeen electrons totally.
Now do the electronic configuration of chlorine.
Cl(17) =1s2 2s2 2p6 3s2 3p5
=[Ne] 3s2 3p5
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 3.So,the valence shell is the 3rd shell.
In 3rd shell ,we get seven valence electrons.So each Cl has seven valence electrons.
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