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Lesson 7 and 8

by: Kara Nichols

Lesson 7 and 8 CHM 111

Kara Nichols
GPA 3.7

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These notes cover lesson 7 and 8. Review will be included in the study guide
General Chemistry 1
Mona Chaudhary
Class Notes
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This 2 page Class Notes was uploaded by Kara Nichols on Wednesday June 8, 2016. The Class Notes belongs to CHM 111 at Calhoun Community College taught by Mona Chaudhary in Spring 2016. Since its upload, it has received 28 views.

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Date Created: 06/08/16
College Chemistry 1 – Mona Chaudhary 6/6/2016 Important Words or Definitions Important People Important Concepts Lesson 7  Bonds o Ionic bonding  A transfer of electrons  Electronegativity difference greater than 1.9  Between metals and non-metals  The farther apart they are, the more likely they are to bond o Covalent  Sharing of electrons  “Share a pair”  Electronegativity difference between 0 and 1.9  Between nonmetals and non-metals  Non-Polar / Pure  When the difference in electronegativity is 0  Equal sharing of electrons  Diatomic molecules o H O2N 2l 2 2 o Polar  When the difference in electronegativity is greater than 0 but less than 1.9  Unequal sharing of electrons  Partial charges represented by delta (ẟ+ or ẟ-)  Dipole  NO, CO, H O 2  Intermolecular forces of attraction o Attraction between molecules o Forces hold molecules close to each other  London/Dispersion force  Weakest  Non-polar molecules  Dipole-Dipole  Intermediate force  Polar molecules  Hydrogen Bonding  Strongest  Only when hydrogen bonds with N, O, and F o Hydrogen bonding is “FON” College Chemistry 1 – Mona Chaudhary 6/6/2016 Important Words or Definitions Important People Important Concepts Lesson 8  Naming Compounds Greek Prefix: What is the first element?  Non-Metal 1 = mono  Non-Metal + anion 2 = di  Use the Greek prefix before each name to show how many there are 3 = tri o CO /2Carbon dioxide 4 = tetra  Group I, II, or III metal 5 = penta  Name the metal and anion o KO / Potassium Oxide 6 = hexa  Transition metal (or Sb, Sn, Bi, or Pb) 7 = hepta  Determine the charge of the transition metal o You can usually tell the charge by the 8 = octa subscript on the anion 9 = nona o If not, you have to calculate the charge 10 = deca of the anion, and divide by the number of transition metal atoms (the subscript)  Metal (charge in roman numerals) + anion  Writing Formulas o Write down the first element (or Poly Atomic Ion) o If it’s a metal: Roman Numerals:  Group I, II, or III  Write the atom and charge (group number) 1 = I  Write the anion and charge 2 = II  Determine the number of each atom needed 3 = III to make the total charge neutral (show as subscript) 4 = IV  Transition metal (or Sb, Sn, Bi, or Pb) 5 = V  Write the atom and charge (whatever is in Roman Numerals) 6 = VI  Write the anion and charge 7 = VII  Determine the number of each atom needed 8 = VIII to make the total charge neutral (show as subscript)


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