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Unformatted text preview: 12 amu is called a) mass number c) isotopic mass b) atomic mass d) molecular mass (1pt) 6. Completion a) Horizontal rows in the periodic table periods b) Elements to the right of the stair-step line in the periodic table mostly nonmetals (1pt) 7. Write complete isotopic symbols for atoms with the following characteristic: a) sodium atom with 12 neutrons 11 Na 23 (1pt) 8. Draw the electron dot symbol for carbon. You need to draw C with four single dots around it (2pts) 9.Gallium has two naturally occurring isotopes Ga-69 and Ga-71. Calculate the atomic mass for gallium if gallium consists of 60.12% (68.9257 amu) and 39.88% (70.9249 amu). 69.72 amu...
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This test prep was uploaded on 04/10/2008 for the course CHEM 231 taught by Professor Hanover during the Spring '08 term at Lansing.
- Spring '08