Question

Define valency by taking ex. Of silicon and oxygen

Answer 1

Explanation:

Define valency by taking examples of silicon and oxygen. The combining capacity of an element is called its valency. The number of electrons present in the outermost shell of an atom gives its valency. ... For example, the atom of oxygen has six valence electrons. Thus, the valency of oxygen is (8 − 6) i.e., two.

Answer 2

Valency :-

It is the combining capacity of an atom of the element and is numerically equal to the number of electrons present in the valence shell of an atom if the number of electron is 1 to 4 or 8 (-) the number of electrons present in the valence shell of atom if the number of electron is more than 4.

Ex :-

Silicon = 14Si

Electronic Configuration = 2 , 8 , 4

Valency = 4

Oxygen = 8(O)

Electronic Configuration = 2 , 6

Valency = 8 - 6 = 2