support staff meaning, support staff definition | English Cobuild dictionary. support. 1 verb If you support someone or their ideas or aims, you agree with them, and perhaps help them because you want them to succeed. (=back) (Antonym: oppose) The vice president insisted that he supported the hard-working people of New York... V n.
The valence shell is the outer shell of the atom. Some materials have a free electron in their valence shell and this electron can easily move from atom to atom. The free electrons are responsible for electrical current.
The number of electrons that an atom must acquire, or lose, or share to reach a stable configuration of 8 (2 for hydrogen) is called its valence. Hydrogen, lithium, sodium, and potassium atoms all have a single electron in their outermost shell. Fluorine, chlorine, bromine, and iodine atoms all have 7.