A student is studying lithium, a highly reactive element that is used in the medical field. Which characteristic is the student studying to determine the reactivity of lithium? Refer to the Periodic Table

A.
The 3 protons in each atom of lithium.

B.
The 4 neutrons in each atom of lithium.

C.
The 3 total electrons in each atom of lithium.

D.
The 1 valence electron in each atom of lithium.

Q&A Education