Valence electrons are present in outermost shell. They are at far distance from nucleus.
a core electron, is an electron that isn't a valance electron. That means any electron that is not on the outer shell of an atom
This electron is a valance electron.
Valance electron
A halogen is located in group 17 of the periodic table, so the electron configuration for the valance electron would be ns2np5 (n=energy level). So all halogens have 7 valance electrons.
metallic bond
A valance electron is one that is associated with an atom. The valence orbit is the one that electron travels in.
That is a chemical change.
the valence electron of lithium that is easily removed is the 1s2 electron
An atom is a nucleolus and an associated electron cloud. They bond by swapping OR sharing (valance or outer) electrons.
In an Atom!
It has 7 electrons in its valance shell so it needs only 1 electron to form a octet; the Nobel gas configuration.
A sodium atom has one valance electron which it donates to a chlorine atom which has seven valance electrons; as a result of this electron exchange, both the sodium and the chlorine will then have complete outer electron shells, and they also will both become electrically charged ions which will attract each other.