Bond Polarity

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6 Terms

1
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Electronegativity

The power of an atom to attract the bonding pair of electrons in a covalent bond

2
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Effect of the size of the positive charge

Increased positive charge increases attraction between nucleus and bonding pair

3
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Effect of atomic radius

Smaller atomic radius means bonding pair is closer to nucleus so attraction is stronger

4
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Effect of shielding

The more shielded the bonding pair is from the nucleus, the weaker the attraction

5
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Dipole

Separation of charge

6
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Polar bond / Polar molecule

When one atom is more electronegative than another in a covalent bond

If dipoles cancel out, molecule is not polar as there is no overall bond polarity