The model on the right looks bumpy, but when you break a large salt crystal in two, the edges of the split often look straight and feel smooth. Is there a problem with the model? Use what you have learned about atoms to explain.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.

How much energy is required to vaporize 2 kg of copper? a 4730 kj b 207kj c 9460 kj d 414kj