Valence shell expansion refers to the phenomenon where elements from the third row and below on the Periodic Table can exceed the octet rule by utilizing d orbitals in addition to s and p orbitals to accommodate more than eight electrons in their valence shell. This allows these elements to form more than the usual number of bonds and have expanded valence shells.
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.
there are 8 electrons in the valence shell of neon
That neutral silicon atom has four electrons in its valence shell.
there are 8 electrons in the valence shell of neon
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
If you are talking about the valance electrons any elements in group 5 on the periodic table will have 5 valance electrons.
Elements with incomplete valance shell as well as incomplete penultimate shell are called transition elements.