How can we find valency, positive & negative as well?

Asked by simran2 | 20th Jul, 2010, 12:00: AM

Expert Answer:

The combining capacity of an atom is known as Valency. It is equal to the number of electrons lost, or gained or shared when an atomt combines with one or more atoms.

Depending on whether the atom loses, gains or shares electrons, the valency may be positive or negative or neutral respectively.

Example: Valency of potassium is + 1, because it can lose one electron. It is represented as K+. Valency of oxygen may be - 2 as it accepts 2 electrons i.e., O2-.

Answered by  | 21st Jul, 2010, 03:29: PM

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