Which elements have the same number of energy shells (levels)? magnesium (Mg)
rubidium (Rb)
boron (B)
iodine (I)
argon (Ar)
silicon (Si)

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

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

How to calculate the mass of copper