Which one is smallest to largest glucose molecule starch molecule protein molecule carbon dioxide molecule water molecule amino acid molecule oxygen molecule

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Areaction in which products can react to re-form reactants is