Question

State the number of valence electrons in:

alkali metals

Answer 1

Valence electrons are the electrons present in the outermost shell of an atom.

• Number of valence electrons in alkali metals is 1.
• Example of halogens: Group-1 members of the modern periodic table like Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Caesium (Cs)
• Example: Lithium has 3 electrons distributed as 2, 1
• Sodium has 11 electrons distributed as 2, 8, 1.
• Potassium has 17 electrons distributed as 2, 8, 8, 1
• So the number of valence electrons is 1 for alkali metals.