An atom of a certain element has 28 protons, 28 electrons, and a mass number of 59. How many neutrons are in this atom?

Compare and contrast the bohr model and the electron cloud models of the atom.

Name the intersection of plane bpq and plane cpq.

Complete the following statements to describe solids, liquids, and gases. select the correct answer from each drop-down menu. a solid a definite volume and a definite shape. a liquid a definite volume and a definite shape. a gas a definite volume and a definite shape