Periodic law states that when the elements are arranged according to their atomic numbers, this allows elements with similar properties to appear at regular intervals. Predict the group of elements and their number of valance electrons that will combine in a 3:2 ratio to with calcium

Stage in which a typical star has completely stopped fusion

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

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.