Question

What is the relationship between the electronic configuration of an element and its valency?

Answer 1

1. The number of electrons in an element's outermost shell, or valence electrons, determines the element's valency.
2. The number of valence electrons in an element can be determined from its electronic configuration.
3. Valency is equal to the number of valence electrons for elements with 1 to 4 valence electrons.
4. Valency is equal to [8 - (number of valence electrons)] for elements with 5 to 8 valence electrons.