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Unformatted text preview: luu (nml299) – HW11 – markert – (58710) 1 This print-out should have 19 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points How many protons does iodine (I) have? 1. 20 2. 1 3. 16 4. 53 5. 6 002 10.0 points Uranium is 238 times more massive than hy- drogen. Why, then, isn’t the diameter of the ura- nium atom 238 times that of the hydrogen atom? 1. Uranium has 92 times as much positive charge as hydrogen; this greater charge pulls the surrounding electrons into tighter orbits. 2. Most of the atom’s mass is localized in the nucleus and most of the volume is defined by electrons’ orbits. 3. There are very strong forces between nu- clei in the uranium atom. 4. There are very few electrons in the ura- nium atom. 003 10.0 points X rays bombarding heavy atoms can be used to eject electrons from the 1 s shell in atoms; indeed, this is the starting point for Moseley’s experiments....
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This note was uploaded on 09/22/2010 for the course PHY 58710 taught by Professor Markert during the Spring '09 term at University of Texas.
- Spring '09