Module 1 Unit 3 Assignment D

Module 1 Unit 3 Assignment D - protons, 92 electrons, and...

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MODULE 1 UNIT 3 Assignment Part D 1. Write the symbols for deuterium and for tritium. For each, identify the mass number and the atomic number. Deuterium is 2 1 H Mass number is 2 Atomic number is 1 Tritium is 3 1 H Mass number is 3 Atomic number is 1 2 marks 2. Find the number of protons, electron and neutrons corresponding to the following symbols. a) Sr 90 38 mass number is 90, atomic number is 38 therefore there are 38 protons, 38 electrons and (90-38) =52 neutrons b) U 238 92 mass number is 238 atomic number is 92 therefore there are 92
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Unformatted text preview: protons, 92 electrons, and (238-92) = 146 neutrons. c) I 129 53 mass number is 129 atomic number is 53 therefore there are 129 protons, 129 electrons, and (129-53)= 76 neutrons. d) -Br 80 35 mass number is 80 atomic number is 35 therefore there are 35 protons, 36 electrons (carries a negative charge therefore more electrons) and (80-35)=45 neutrons. 8 marks Total 10 marks Submission Instructions Submit your assignment using the drop box on the Assignment page for this unit....
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This note was uploaded on 06/14/2011 for the course CHEM 1 taught by Professor Bielecka during the Spring '11 term at Georgian.

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