Answer:
Neon
Explanation:
All noble gases have 8 valence electrons except helium.
Noble gases include Helium, neon, argon, krypton, xenon, redon.
Electronic configuration of neon:
Ne₁₀ = [He] 2s² 2p⁶
All other options are incorrect because,
Electronic configuration of Fluorine:
F₉ = [He] 2s² 2p⁵
Fluorine have seven valence electrons.
Electronic configuration of oxygen:
O₈ = [He] 2s² 2p⁴
Oxygen have six valence electrons.
Electronic configuration of sodium:
Na₁₁ = [Ne] 3s¹
sodium have one valence electron.
