# Trick To Find Valency of an Element

Let’s Learn to calculate the Valency of an element quickly By using this Trick

# Trick To Find Valency of an Element :

Conditions for this trick to apply,
1. You must know the Valence Electron of that Element.
2. This trick is only suitable for S & P block elements
3. It won’t applicable for D block elements due their variable Oxidation states.
4. Lower P block elements do not come under this trick because they’ll possess Inert Pair Effect  Eg:  Lead, Tin etc
5. Noble Gases doesn’t have any valency due to their octet stability (Outer Orbital Filled with Electrons)

## Trick to find valency :

Let’s look at the trick to find valency of an element. There are two formulae to calculate the Valency of elements.

• If Valence Electron is Equal to 1,2,3,4 then the Valency of Element also same as the valence electron.
Eg : Carbon valence electron is
Carbon Electronic configuration – 1s²,2s²2p², then valence is 4
Therefore the Valency of Carbon is FOUR

• If the Valence Electron is more than 4,5,6,7 then the Valency of Element is  (8 – Valence Electron)
Eg : Fluorine valence electron is
Fluorine Electronic configuration – 1s²,2s²2p⁵, then valence electron is 7
Therefore the Valency of Fluorine is (8 – Valence Electron)  {8-7} is ONE
Sample :

 Element Electron ArrangementsIn Orbitals Valence Electron Valency Of Element Li 1s²,2s¹ 1 1 Cl 1s²,2s²2p⁶,3s²3p⁵ 7 1 C 1s²,2s²2p² 4 4
So the Valency Of Element is depend on the Valence Electrons present in the Element.

### What is Valency ?

Valency is the combining or Bonding Capacity of an Particular Element. It can be easily Calculated by knowing the element’s Valence electrons.

#### What is Valence Electrons ?

The Electrons present in the very outer most Orbital of atom

#### Does Valency have Any Sign ?

Valency of elements do not have any sign.
But Valency of elements have Charge.

Positively Charged.(Loss of Electron)
• Negatively Charged.(Gain of electron)

### Sample Questions for applying Trick to find valency of an atom : ### What is the valency of Aluminium ?

The valence electrons of Aluminium can be calculated by its electronic configuration 1s2 , 2s2 2p6 , 3s2 3p1 . The Valence electron is 3. Therefore valency of Aluminium is THREE

### What is the valency of Germanium ?

The valence electrons of Germanium can be calculated by its outer most electronic configuration is 4s2 4p2 . The Valence electron is 4 like Carbon . Therefore valency of Germanium is FOUR