An element has an atomic number of 30. how many protons and electrons are in a neutral atom of the element?
a. 30 protons, 30 electrons
b. 15 protons, 15 electrons
c. 60 protons, 30 electrons
d. 30 protons, 0 electrons

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

Using the periodic table, complete the table to describe each atom. type in your answers

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