1. Atoms are composed of Electrons orbiting around a positive nucleus. Protons orbiting around a negative nucleus. None of the above. Skip.	2. Elements are distinguished by The number of protons. The number of electrons. Either one of the above. Skip.
3. If something leaves the atom, it will most likely be The proton. The electron. The neutron. Skip.	4. Each element has characteristic energy levels available to its electrons. True. False. Skip.
5. The exact position of an electron can be determined using quantum mechanics. True. False. Skip.	6. Quantum mechanics is used to explain Why the sky is blue. Why leaves are green. Neither of the above. Skip.
7. ROY G BIV arranges the colors of the rainbow In order of increasing energy. In order of increasing wavelength. In order of decreasing frequency. Skip.	8. Heat, electricity, or light can excite electrons in an atom and result in the atom giving off light. True. False. Skip.
9. The ocean is blue because It reflects the blue sky. It selectively reflects blue light from the sun. It selectively absorbs red light from the sun. Skip.

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