what is valency free pdf 2022

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what is valency

what is valency ? What is its use ?

Ans- Valency is the combining capacity of an element. It can be used to find out how many atoms of an element will combine with the other element to form a chemical formula.
For example, hydrogen has a valency of +1 and chlorine has a valency of -1, so one atom of hydrogen combines with one atom of chlorine to form hydrochloric acid. Further oxygen has a valency of —2, so one atom of oxygen combines with 2 atoms of hydrogen to form water molecule, H,O

Do all elements have a charged valency ? Explain

All elements do not form ions so their valencies do not have a charge. For example, carbon and silicon have a valency of 4 and nitrogen has a valency of 3. Further molecules containing only non-metals are formed without a charged valency.
For example, in carbon tetrachloride (CCI,), carbon has a valency of 4 and chlorine has a valency of 1

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what is valency free pdf 2022