What experiment did J. J. Thomson do? A. He sent a cathode ray between electrically charged metal plates.

B. He suspended charged oil drops in a chamber.

C. He hit metal plates with light.

D. He shot alpha particles through gold foil

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals