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When given a complete Lewis structure; then how is the level of hybridization determined for each element in the complete Lewis structure?

Question

When given a complete Lewis structure; then how is the level of hybridization determined for each element in the complete Lewis structure?

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Step 1

Hybridisation of each element can be determined from a complete Lewis structure. The simple way to determine the hybridisation of an element in a compound are:

  1. Look at the element or atom in the given Lewis structure for which you want to find the hybridisation.
  2. Count the number of atoms connected to it.
  3. Count the number of lone pairs on that atom or element.
  4. Add these two numbers together.
  • If it’s 7, the atom is sp3d3
  • If it’s 6, the atom is sp3d2
  • If it’s 5, the atom is sp3d
  • If it’s 4, the atom is sp3
  • If it’s 3, the atom is sp2
  • If it’s 2, the atom is sp
Step 2

For example:

  1. To determine the hybridisation of oxygen (O) in water molecule.
The Lewis structure of water is
H
No. of atoms connected to O 2
No. of lone pairs on O 2
Total 4
Hence, the hybridisation of O in H2O is sp3
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The Lewis structure of water is H No. of atoms connected to O 2 No. of lone pairs on O 2 Total 4 Hence, the hybridisation of O in H2O is sp3

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Step 3
  1. To determine the hybridisation of oxygen ...
The Lewis structure of acetone is
H
H
C.
H
H
H
No. of atoms connected to O
1
No. of lone pairs on O 2
Total 3
Hence, the hybridisation of O in acetone is sp2
help_outline

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The Lewis structure of acetone is H H C. H H H No. of atoms connected to O 1 No. of lone pairs on O 2 Total 3 Hence, the hybridisation of O in acetone is sp2

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Chemical bonding

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