Hiro rolls up a paper towel and puts it in a straw. He puts one end of the straw in a glass of water and observes the movement of the water from the glass up the towel. Which statement best describes Hiro’s model?

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