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Learning Intentions

• You can describe how the different types of bonds form

• You can describe the structure of covalent bonds and how structure influences properties.

• You can draw Lewis structures for covalent bonds.

Content Standards being covered:

*Student understands why bonding (intramolecular forces) occurs between atoms, what types of bonds form when different elements interact, how the bonds form and properties that arise as a result of the bond forming.
93. Electronegativity is the amount of attraction that an atom has to pull an electron to itself, removing it from another atom and forming an anion (measured in Pauling Units)
121. Ionic compounds have large differences between the electronegativities of atoms >1.7
122. Covalent compounds (molecular compounds) have smaller (polar) <1.7 or no differences (non polar) between electronegativities of atoms
137. A polar molecule is a molecule where the atoms do not share the electrons equally (they have a difference in electronegativity between 0.4 and 1.7) or the molecule is unsymetrical and so create a slightly polar compound wherein one element becomes slightly positive and the other slightly negative
138. Nonpolar molecules are formed when there is no difference in electronegativity, < 0.4 or the overall compound is symmetrical

Habits of Mind/Life skills being covered:

Thinking and Communicating with Clarity

Making Connections with Past Knowledge

Journal Entry:

 What differences in electronegativities determine ionic, polar covalent and nonpolar covalent bonds?