Question

What is valency??write in brief

Answer 1

the total numbers of electrons present in the outermost shell of a nucleus is known as valence electron and they determine the valency of atom .
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Answer 2

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VALENCY》》》》》》》》》》《《《《》

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Valency can be defined as the combining capacity of an element.The electrons present in the outermostmost shell of an atom  are known as valence electrons and they determine the valency.The valence electrons take part in chemical reaction and they determine the chemical properties of the elements.Let us take an example,

The atomic number of carbon is 6

Its configuration is =2,4 

It means valency of carbon is 4.

Valency of an atom is simply equal to the number of electrons gained, lost or shared by an atom to achieve the nearest noble gas configuration.

Some other eg are


the valency of sodium (Na) is 1

, magnesium (Mg) is 2,

Chlorine (Cl) is 1

etc
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