What does n, l and s mean in chemistry?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.

If an atom has 12 protons and 13 neutrons