Which Item is denser than liquid water? A. Metal fork
B. Plastic cup
C. Paper plate
D. Wooden spoon

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

If a particle has z = 25 and 23 electrons, what is its charge?

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products