Which atomic theory is described by the following statements? 1. The mass of an atom is concentrated in a small positively-charged center called nucleus. 2. The atom is an indestructible sphere. 3. Electrons are found in a region called electron cloud. 4. Tiny negative charges are scattered throughout a positively-charged atom. 5. Electrons move around a positively-charged nucleus. 6. Electrons move around the nucleus in specific energy levels/shells. 7. Electrons lose energy when they move to low-energy orbit. 8. Atoms of different elements combine to form different materials(compounds). 9. Electrons were discovered through this atomic model. 10. Different materials are made up of different atoms.​