polar bears and penguins
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Polar Bears and Penguins
Polar Bears and PenguinsMaking Sense page 135Unit 2 Investigation IVThe ability of an atom to attract electrons shared between two atoms is called electronegativity.
High electronegative atoms (polar bears) gain a - (partial negative)
Low electronegative atoms (penguins) gain a + (partial positive)Making Sense -133
2Water Molecule:Oxygen attracts the shared electrons towards itself so it is partial negative. Hydrogen is less electronegative so the shared electrons are pulled away. It becomes partially positive. Unit 2 Investigation IV
Direction of pull There is a crossed arrow to show the direction of the dipole in HCl. The crossed end of the arrow indicates the positive (+) end of the polar bond and the arrow points in the direction of the negative (-) end.
4
Nonpolar molecules They have symmetrical shapes like linear and tetrahedral and identical surrounding atoms. (Bonded electrons are being pulled but they are canceled out.
5Unit 2 Investigation IV
Polar moleculesIt is not symmetrical. There are different shapes.6
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