I'm digging back a ways here, so not sure if this is completely correct.....
Valence shell refers to the electron orbitals an element has. If you look at the Periodic Table, all the elements in any column in the table have similar outer electron orbitals and so all of the elements in that column tend to form molecules of the same sort. For example NaCl (salt) and KCl, where sodium and potasium both form the same sort of molecular bond with chlorine.
It has 6 electrons in it's valance shell and needs 2 more electrons in it's valance shell to become stable. Some atoms, phosphorous for instance ( valance # 5 ), can reach deeper into their valance shell and make additional covalent bonds.
Eight - it has a full outer shell of electrons.
A filled orbital has either 2 electrons (if it is the first shell of an atom) or 8 electrons. This is the highest number of electrons these shell can hold Every orbital tends to complete itself to form a stable element. A filled orbital could be any orbital, either 1st, 2nd, second last or last shell of the atom. An unfilled orbital always has atleast one less electron than the shell can hold. It is always the last shell of an atom and always makes the atom unstable as atom tends to acquire inertness by trying to get this unfilled oribital filled.
there are 8 electrons in the valence shell of neon
That neutral silicon atom has four electrons in its valence shell.
K shell.
A full octet, valance shell. A valance shell with eight electrons, such as the Nobel gases have, doe not need to donate or accept electrons into or out of the valance shell to be stable.
outermost
It has 6 electrons in it's valance shell and needs 2 more electrons in it's valance shell to become stable. Some atoms, phosphorous for instance ( valance # 5 ), can reach deeper into their valance shell and make additional covalent bonds.
It's valance shell does not contain an octet of eight valance electrons. That simple.
8
1
There is one electron in sodium's valance shell.
No. It has Two electron in its valance shell.
Valance electrons
No. It has two shells with 2 and 1 electron each. The second shell is unfilled.
If you are talking about the valance electrons any elements in group 5 on the periodic table will have 5 valance electrons.