What is meant by valency? Write the valency of Na, Mg, Ca and Al.
Valency - The capacity of an element to combine with other elements and form molecules is called valency.
The valency of an atom is based on the number of electrons available for bond formation.
ELEMENT | SYMBOL | VALENCY |
---|---|---|
Sodium | Na | 1 |
Magnesium | Mg | 2 |
Calcium | Ca | 2 |
Aluminium | Al | 3 |