What food item will provide a minimum of 1 mole of both sodium and potassium with the least mass? What is that mass?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract