Valence Shell & Valence Electron

Observe how electrons are arranged around the nucleus. Highlight valence shells and electrons to understand chemical properties.

• Valence Shell: Outermost shell containing electrons.
• Valence Electrons: Electrons in the valence shell that participate in reactions.
• Sodium (Na): 11 electrons, 1 valence electron.
• Chlorine (Cl): 17 electrons, 7 valence electrons.