The number of valence shells are responsible for the makeup of the chemical

properties of elements.

A. True

B. False

True

Valence electrons determine whether an atom forms cations, anions, or covalent compounds. Atoms with:

One to three valence electrons - tend to form positive ions.

Five to seven valence electrons - tend to form negative ions.

Four valence electrons - form covalent bonds

The number of electrons in an atom's outermost valence shell governs its chemical properties.