Which of the following statements is false? a. two or more atoms combine chemically to form a molecule. b. two or more different substances combine physically to form a mixture. c. two or more different atoms combine chemically to form an element. d. two or more elements combine chemically to form a compound.

C. Two or more different atoms combine chemically to form an element.

Iwould say a is accurate

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.