* Valency refers to the combining capacity of an element. It's the number of electrons an atom can gain, lose, or share to form chemical bonds.
* Sulfur trioxide is a molecule, not an element. It's formed by the combination of sulfur (S) and oxygen (O) atoms.
* The oxidation state of sulfur in SO₃ is +6. This means that sulfur has lost 6 electrons in the formation of the molecule.
Therefore, a more accurate statement would be:
"The oxidation state of sulfur in sulfur trioxide is +6."
Here's a breakdown of why this is important:
* Valency is a property of individual atoms. It's not directly applicable to molecules.
* Oxidation state reflects the charge an atom would have if all bonds were ionic. It helps us understand the electron distribution and bonding in molecules.
