An atom's valence electrons are located in the atom's outermost energy level, true or false?

The statement: An atom's valence electrons are located in the atom's outermost energy level is true

Valence electron(s) are electrons located on the outermost shell (energy level) of an atom.

The valence electron of an atom determines the chemical reactivity of the atom. Hence, valence electron can also be defined as the combining power of an atom.

Valence electron also determines the group to which an atom belongs.

The diagram below justify the fact that valence electron(s) are located on the outermost shell of an atom.

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