answersLogoWhite

0

Helium and neon have completely full electron shells. Helium 1s2 and neon 1s2 ; 2s2, 2p6. The stability of any chemical bond formed would be insufficient to compensate for the extra energy required to add, remove or promote electrons to form the bonds.

The heavier noble gases, Argon, Krypton, Xenon and Radon are of very low chemical reactivity because their normal complement of electrons is sufficient to fill all their inner electron shells and fill their outer valence with 8 electrons, ns2, np6. This outer shell although incomplete still means that chemical bonds are difficult to form. However it is not impossible as highly reactive compounds are known for all these elements. The best known of them are fluorides oxy-fluorides (and oxides for xenon) which are unstable powerful oxidising agents.

User Avatar

Wiki User

11y ago

What else can I help you with?