Describe the change that Bohr made to the nuclear model

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

In salt water solution,the salt is the blank

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.