What is the charge on an ion that has 19 protons, 22 neutrons, 18 electrons?

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

The atoms in a have a definite volume, but move quickly enough to overcome the forces of attraction between them. a. solid b.liquid c.gas