CHEM 1000 Test 1B - Spring 2008

CHEM 1000 Test 1B - Spring 2008 - NAME:_ Spring 2008...

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NAME:____________________________ Student Number:______________________ 1 Spring 2008 Chemistry 1000 Midterm #1B ____/ 59 marks INSTRUCTIONS: 1) Please read over the test carefully before beginning. You should have 6 pages of questions, and a formula/periodic table sheet (7 pages total). 2) If your work is not legible, it will be given a mark of zero. 3) Marks will be deducted for incorrect information added to an otherwise correct answer. 4) Marks will be deducted for improper use of significant figures and for missing or incorrect units. 5) Show your work for all calculations. Answers without supporting calculations will not be given full credit. 6) You may use a calculator. 7) You have 90 minutes to complete this test. 1 . [5 marks] (a) Which neutral element has the valence electron configuration 4s 2 3d 10 4p 2 ? [1 marks] (b) Which neutral element is the first element in the periodic table that has a completely filled 3 rd s h e l l ? [2 marks] (c) Give two examples of cations that have the valence electron configuration 3d 5 . [2 marks] 2. Complete the table below. [5 marks] Isotope: 35 Cl - Number of electrons: 54 Number of neutrons: 79 Number of protons: Overall charge: -1 +2
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NAME:____________________________ Student Number:______________________ 2 3 . [9 marks] (a) What wavelength of light should you use to excite an electron in a hydrogen atom from the 3s orbital to the 5s orbital? Express your final answer using an appropriate SI prefix so that the value is between 0.1 and 1000. [7 marks] (b) How does the wavelength change if the electron is excited from the 3s to the 5p orbital of the hydrogen atom? [2 marks]
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CHEM 1000 Test 1B - Spring 2008 - NAME:_ Spring 2008...

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