How many electrons will make a shell stable?

Answer 1

This depends which shell it is up to. Helium has a full shell and it only has 2 electrons. Neon then, still with a full outer shell has 8 on the full outer shell with 2 inside those 8.

This keeps changing as you go up. I do believe the amount of electrons on the outer shell goes 2, 8, 8, 18, 18, 32. Those apply to the stable elements (in order) Helium, Neon, Argon, Krypton, Xenon and Radon.

Those numbers apply to the outside shell, please note all the shells below that outside one still exist and are still full.

Answer 2

A shell will be stable when it is filled with the maximum number of electrons it can hold based on its energy level. For the first shell, 2 electrons make it stable (since it can hold a maximum of 2 electrons). For subsequent shells, the stability generally occurs when the shell is filled to its maximum capacity (2, 8, 18, 32, etc. electrons for each successive shell).

Answer 3

if the rings are filled up the atom is stable. the first ring holds four the second ring holds 8 i believe.

Answer 4

Eight valence electrons to be stable.