At atom that has only one electron in its valence electron shell is ________ chemically reactive.
a. not
b. mildly
c. highly
d. The name of the element is needed to figure this out.
The correct answer is C. An atom having only one valence electron is highly chemically reactive. The valence electron says a lot to the reactivity of an atom. For example, sodium has only one valence electron which makes it so reactive and unstable. The alkali metals have only 1 valence electron.
