In metals, they are transfered during reactions or thought to be lost during ion formation
At least one, and usually all, of the valence electrons of the metal atom is donated to the valence shell of the nonmetal atom.
valence electrons are shared in covalent bonding
They Share Electrons
A carbon needs 8 electrons to have a solid shell so it usually form 4 other bonds to combine with the 4 electrons it already has
Electrons in the outermost shell are valence electrons!
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
Valence electrons
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
halogen NOTE added by Dr.J.): A halogen doesn't have a few valence electrons. They have 7 valence electrons.
the electrons in the outermost shell of an atom are considered to be the valence electrons.
The NCl3 molecule, like most other stable molecules, exist because they share electrons in such a way as to close out the valence shell. Therefore, although one usually doesn't say so in regards to molecules, NCl3 has 8 valence electrons.
Valence electrons are the ones which participate in chemical reactions in some way, either by moving from one atom to another, or by being shared with another atom. They are found in the outer shell of an atom (there are usually inner shells with other electrons that are not valence electrons, although in the lightest elements, there are no inner shells and all electrons are valence electrons).