WS 02 - Key - a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 b. 1s 2...

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Name: _____________________________ Quiz Section:_______ CHEM 120A – Autumn 2011 Worksheet #2 1. Write the name of the element for each of the following symbols: a. Co _______________________ b. Ag _______________________ c. Sn _______________________ d. C ________________________ e. Al _______________________ 2. What are the chemical symbols for the following elements: a. Chromium _________ b. Oxygen ___________ c. Potassium _________ d. Gold ______________ e. Argon _____________ 3. Identify the element described by the following a. A noble gas in Period 5 ________________ b. A metalloid in Period 3 _______________ c. An alkali metal in Period 2 ______________ 4. Complete the following table: Symbol Number of Protons Number of Neutrons Number of Electrons 3 H 1 2 1 56 Fe 26 30 26 239 Pu 94 145 94 81 Br 35 46 35 133 Cs 55 78 55 5. Identify the elements and draw orbital diagrams for atoms with the following electron configurations:
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Unformatted text preview: a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 b. 1s 2 2s 2 2p 5 6. Consider the following waves representing electromagnetic radiation: 2.0 x10-6 m Wave a Wave b a. Which wave has the longer wavelength? Calculate the wavelength. b. Which wave has the higher frequency? c. Which wave has the larger photon energy? d. Which wave has the faster velocity? e. What type of electromagnetic radiation is illustrated? 7. Indicate the number of each in the following: a. Orbitals in the energy level n = 2 b. Sublevels in the energy level n = 4 c. Orbitals in the 5f sublevel d. Orbitals in the 5p sublevel 8. Write the electron configurations for the following elements or ions: a. Titanium b. Se 2-[Ar]4s 2 3d 10 4p 6 c. Be 2+ 1s 2...
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WS 02 - Key - a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 b. 1s 2...

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