Module 2 Unit 3 Assignment A

Module 2 Unit 3 Assignment A - This is a covalent polar...

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MODULE 2 UNIT 3 Assignment Part A 1. a. Explain how electronegativity changes when you move down a group (column) of the periodic table, from the top to the bottom. 2 marks It generally decreases as you move down a column on the table. b. Explain how electronegativity changes when you move across a period (row) of the periodic table, from left to right. 2 marks The electronegativity generally increases as you move across the table. 2. Calculate the difference in electronegativity between the atoms participating in covalent bonds for each of the following compounds. Then, select the choice corresponding to the correct structural diagram, including the polarity of the bonds, for each compound. a) HBr H is 2.2 Br is 2.96 difference is -.76 i) is the correct diagram.
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Unformatted text preview: This is a covalent polar bond. i. ii. iii. b) CH 4 C is 2.55 H is 2.2 Difference is .35. Correct diagram is ii). This is a covalent polar bond. i. ii. iii. Note: The molecule of CH 4 and a few others dont follow the rule weve established to determine the order of atoms in the formula. According to our rule, hydrogen should appear first in the formula CH 4 . c) NF 3 N is 3.04 F is 3.98 Difference is -.94 The correct diagram is ii). This is a polar covalent bond. i) ii) iii) d) Ol 2 O is 3.44 I is 2.66 Difference is .78. The correct diagram is iii). This is a polar covalent bond. i) ii) iii) 8 marks Total 12 marks Submission Instructions Submit your assignment using the drop box on the Assignment page for this unit....
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Module 2 Unit 3 Assignment A - This is a covalent polar...

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