No reactive elements always have partially filled shells- never full outer shells. Because they are partially filled they are less stable and want to react. If they had full shells they would be very stable.
When the outer shell of an element is full/complete it is not willing to donate or accept any more electrons into or out of that shell. A large amount of energy would be required to force this, thus these elements have little or no reactivity (Noble gases).
Not necessarily. All atoms have outer shells, it is how full the outer shell is that is a factor in reactivity. An atom with a full outer shell is nonreactive, while one with a nearly full or nearly empty outer shell is reactive.
one electron
False.
stable and chemically nonreactive, or inert.
The outer shell of an atom is the valence shell, which contains the valence electrons.
"valance shell"
8 electrons on the outer shell
The outer shell of an atom is most stable or non reactive with 8 electrons. 1 or 2 valence electrons would be reactive. It also would depend if it's bonded with another element.
an incomplete outer shell of electrons
stable and chemically nonreactive, or inert.
The outer shell of an atom is the valence shell, which contains the valence electrons.
An oxygen atom has six (6) electrons in its outer shell.
"valance shell"
Valence shell
Valence shell
Where there are 8 electrons in the outer shell so a full shell. Elements are reactive when they need to lose or gain an electron. The noble gases are unreactive as they have a full outer shell.
A sodium atom has 11 protons and 11 electrons including 1 outer shell electron A magnesium atom has 12 protons and 12 electons of which 2 are in the outer shell. Sodium loses its valence electron more easily than magnesium does, making the sodium much more reactive.
the valence shell
Valence shell
No. Chlorine's electron configuration is unstable. As a result, chlorine is a highly reactive element.