Group 18 elements (helium, neon, and argon) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration. Elements in other groups have partially filled valence shells and gain or lose electrons to achieve a stable electron configuration.
Is neon valence shell full?
Some atoms can be stable with an octet even though their valence shell is the 3n shell, which can hold up to 18 electrons. ... In this table, you can see that helium has a full valence shell, with two electrons in its first and only, 1n, shell. Similarly, neon has a complete outer 2n shell containing eight electrons.
How many valence shells does neon have?
Neon, with its configuration ending in s2p6, has eight valence electrons.
