How many valence electrons does sodium have?
Answer:
Sodium has one valence electron.
Explanation:
To find out the number of valence electrons in a sodium atom,we need to look at the periodic table.
The position of sodium in the periodic table is in group IA.For main group elements,valence electrons are equal to the group number.So,sodium atom has one valence electrons in its valence shell.
Sodium 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 sodium.
Here is the another way to find out the valence electrons of sodium.
The symbol of sodium is Na and the atomic number of sodium is 11.So, it has eleven electrons totally.
Now do the electronic configuration of sodium.
Na(11) =1s2 2s2 2p6 3s1
=[Ne] 3s1
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 one valence electron.So each sodium has one valence electron.
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