Question

what is valency ??????????​

Answer 1

Answer:

Valency. It is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element.

Answer 2

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Valency is defined as the combining capacity of an element.The electrons present in the outermost most 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.

For example, The atomic number of beryllium is 4.

Its configuration is 1s2 2s2. The valence shell is 2s and the valency of beryllium is 2.