What is the mass number of element in an atom that has 20 protons and 17 neutrons?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

What methods could you use to solubilize calcium carbonate

How can a mixture of salt water be separated into salt and water