Question

How to calculate the valency of scandium

Answer 1

Answer:

Valency :it can loose 2 electron from 4s and shows +2 oxidation state. if it losses 1 electron from 3d then it shows +3 oxidation state. The atomic number of scandium is 21.

Answer 2

Explanation:

The ability of an atom to gain or lose electrons in order to acquire noble gas configuration is known as valency.

For example, atomic number of scandium (Sc) is 21 and its electronic configuration is $[Ar]4s^{2}3d^{1}$. This means there are 3 valence electrons present in a scandium atom.

Hence, Sc can show noble gas configuration by losing 1, 2 or 3 electrons. Therefore, ions of scandium are $Sc^{+}$, $Sc^{2+}$ or $Sc^{3+}$.

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