What is valency of an element

1.	What is valency of an element
Answer» Valency of an element is the combining capcity of an element ( or radicals)For an example Sodium ( NA ) valency = 1 Its a positive radical Chloride ( CL ) valency = 1 Its a negative radicalThus, we known that to form a Chemical formula or Chemical Equation we have to combine the +ve radical and the -ve radical Now, we simply to known and understand this Sodium. Chloride NA. By. CL Cross Multplica- tion 1. 1 = NACL Valency means combining capicity of an element .Relationship between the number of valence electrons and valency:Valence electrons are the number of electrons present in the outermost shell of an atom.Valency is the combing capicity of an element to form bonds with the other elements.For Example:Let us take the case of Oxygen whose Atomic number is 8.Thus,its electronic configuration is 2,6.Oxygen has 6 electrons in its outermost shell and requires 2 more electrons to complete its octet state.So,here Oxygen has 6 valence electrons and 2 as its valency .The number of valence electrons increases from left to right in the periodic table.If the number of valence electrons of an element is equal to 4 as that of carbon,the the element would also have same valency that is 4.

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