Why noble gases are not much reactive?

Answer 1

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.

Answer 2

Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2 valence electrons) and have stable electronic configuration. Hence they are chemically inert and generally donot form compounds under normal conditions.

Answer 3

Noble gases have completely filled valence orbitals and are hence stable or chemically inert.

Answer 4

It does not react because the electrons fill the first energy level, making the noble gases stable.

Answer 5

Noble gases have a low reactivity because they have a complete valence shell.

Answer 6

They have a stable configuration of electrons (octet) in outer shelf.

Answer 7

Because the outer shell of valence electrons is full; but from about 50 years noble gases are not considered as unreactive (excepting helium and neon).

Answer 8

They are already stable.