Chem135 Notes

# Chem135 Notes - b. Calculate the density of the space...

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Weekly Quiz—January 30, 2010 1. In chapter two of your text do problems—1, 8, 9,13,19, 22, 24, 25, 27, 47, 54, 57. 2. F i ll in the blanks in the table (one column per neutral element) Symbol # protons # neutrons # electrons Name of element 58 Ni 3)0 33 Ik n 10 10 ID 30 25 V 3. A n sw er the questions below for gajjium a. C l a s s i fy this element as /metal) nonmetal or semimetal. b. N

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Unformatted text preview: b. Calculate the density of the space occupied by electrons in 64 Zn. The atomic radius of this atom is 0.125 nm. c. Compare the densities of these two entities. , * " f V M \ 5. We talked about mass defect in class on F,riday. What is this? 6. Define binding energy. * > 7. (You need to know the answers to #1 and #2 for this problem!) Calculate the binding energy (in Mev) for 4 He. You'll use E=mc 2 , remembering that mass defect (m) must be in kg, the speed of light (c) must be in m/s and energy (E) will come out of this equation in joules. The exact masses you'll need are -1.0073 amu for a proton, 1.0087 amu for a neutron, and 4.002602 amu for4He. *-it CUAM /ff \ f ' AM ^L £ * T t / \ v4 ^N \M»^ /...
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## This note was uploaded on 02/12/2011 for the course CHEM 131 taught by Professor ... during the Fall '08 term at Maryland.

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Chem135 Notes - b. Calculate the density of the space...

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