Select the atomic models that belong to the same element.

Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.

In an exothermic reaction at equilibrium, what is the effect of lowering the temperature? a. the reaction makes more products. b. the reaction makes more reactants. c. the reaction is unchanged.

Which of the following statements is true? an atom consists of protons, electrons, and neutrons. an atom consists of protons and neutrons. an atom consists of electrons bonded to one another. an atom consists of protons bonded to one another.