How to find valency of an element

1.	How to find valency of an element
Answer» Valency is the combining capacity of an element. To find the valency write the electronic configuration of the element Then see the no.of electrons preaent in the last shell. If the last shell contains 1 to 4 electrons then that number itself will be the valency. If it contains more than 4 electrons in the valence( last) shell then subtract it from 8 . Because valency is the ability of an electron to lose or share its electrons to attain its octect configuration. Eg: valency of magnesium is 2( (2,8,2) atomic number 12). Phosphorus valency is 3( 2,8,5) ( atomic number is 15)

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