Explain the valency of element.

1.	Explain the valency of element.
Answer» The number of hydrogen or halogen atom ordouble the number of oxygen atom, which combin with one atom of the element is taken as its valency. According to the electronic concept of valency, "the number of electrons which an atom loses or gains or shares with other atom to attain the noble gas configuration is termed as its valency." Periodicity: In period- The valency first increases then decreases from left to right in a period. In group- The valency remains constant from top to bottom in a group.

Answer»

The number of hydrogen or halogen atom ordouble the number of oxygen atom, which combin with one atom of the element is taken as its valency. According to the electronic concept of valency, "the number of electrons which an atom loses or gains or shares with other atom to attain the noble gas configuration is termed as its valency."

Periodicity:

In period- The valency first increases then decreases from left to right in a period.

In group- The valency remains constant from top to bottom in a group.

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