2.1. Sodium is a monovalent cation and chlorine is a monovalent anion. What is the formula of
sodium chloride
Answers
Required Formula :
- NaCl ( Sodium Chloride )
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Answer: formula of
sodium chloride=NaCl
Explanation:Sodiun is a monovalent element. Physically it is a metal. Belongs to 1st group of periodic table. Symbol- Na. (Derived from Natrium - a Latin word)
This group elements are known as Alkali metals. Because they form strong bases when react with hydroxide (OH) groups.
(Alkali- a substance that forms a salt when mixed with an acid.)
Example: NaOH., KOH,
When you see the electronic configuration of sodium 1S^2 ,2S^2, 2P^6,3S^1.
The no of Valence electrons are 1.
Inorder to attain stability(octet /noble gas configuration) it needs to gain 7 electrons or loose 1 electron. The latter is possible. Hence it will loose 1 electron.
The term”monovalent” indicates the no.of electrons present in Valence shell i.e. outermost shell of an element.
Note:1- not only sodium but all the 1st group elements are known as monovalent elements. 2-The Valence of electrons increases from left to right in periodic table which indicates the no.of electrons present in outermost shell
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