Question

exit ticket: lewis dot diagrams practice the only noble gas that does not have 8 valence electrons is ne he ar

Explanation:

Noble gases are known for their stable electron configurations. Helium (He) has only 2 valence electrons as it fills its first - energy level which can hold a maximum of 2 electrons. Neon (Ne) and Argon (Ar) have 8 valence electrons as they fill their outer - most energy levels which can hold 8 electrons following the octet rule.

Answer:

He