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a Question 5 Answer the following questions. Define spectroscopy. (2 marks) ii. Atomic absorption spectroscopy (AAS) uses the absorption of light to measure the concentration of gas-phase atoms. List FIVE (5) components of AAS. (5 marks) b. Electrons in filled inner orbitals are closer to the nucleus and more tightly bound to it, they are rarely involved in chemical reactions. This means that the chemistry of an atom depends mostly on the electrons in its outermost shell called the valence electrons. Derive the ELECTRON CONFIGURATION of He and Ne. (2 mark) ii. Using an ABBREVIATED ELECTRON CONFIGURATION, derive the clectron configuration of fluorine (F) and chlorine (CI). Determine the valence- electron configuration. (Each will carry 2 marks). (6 marks) Using the periodic table attached, derive an electronic configuration using s and p orbitals for Nat, 02, Br-, Cu and Al (5 marks) (Total: 20 marks)