2.2.2 Bonding and structure

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Last updated 11:38 AM on 5/24/26
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11 Terms

1
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(d) Define a covalent bond

strong electrostatic attraction between a shared pair of electrons and adjacent nuclei

2
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(g) What is the name and bond angle of a molecule with 2 bonding pairs, no lone pairs?

linear, 180

<p>linear, 180</p>
3
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(g) What is the name and bond angle of a molecule with 3 bonding pairs, no lone pairs?

trigonal planar, 120

<p>trigonal planar, 120</p>
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(g) What is the name and bond angle of a molecule with 4 bonding pairs, no lone pairs?

tetrahedral, 109.5

<p>tetrahedral, 109.5 </p>
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(g) What is the name and bond angle of a molecule with 3 bonding pairs, 1 lone pair?

trigonal pyramidal, 107

<p>trigonal pyramidal, 107 </p>
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(g) What is the name and bond angle of a molecule with 2 bonding pairs, 2 lone pairs?

non-linear, 104.5

<p>non-linear, 104.5</p>
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(g) What is the name and bond angle of a molecule with 6 bonding pairs, no lone pairs?

octahedral, 90

<p>octahedral, 90 </p>
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(j)(i) How is a polar bond formed?

When two atoms in a covalent bond have different electronegativities

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(j)(ii) How are polar molecules formed?

have polar bonds and an overall dipole (asymmetrical so dipoles don’t cancel)

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(j)(ii) Why do some molecules have polar bonds but are overall not polar?

symmetrical and dipoles cancel out

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(m) What are the anomalous properties of H2O (resulting from hydrogen bonding)?

  • ice is less dense than water

  • has relatively high melting and boiling points