1. water vapor energy because it is a
a. gas
b. solid
c. liquid
d. more
e. less

2. how is heavy water different from normal water

Which element is least likely to undergo a chemical reaction

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope