A Cobalt (Co) atom has a mass number of 60. Its atomic number is 27. How many neutrons does the cobalt atom have?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Stage in which a typical star has completely stopped fusion

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?