Bonding In Methane And Ethane

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C h e m g u i d e – q u e s t i o n s
BONDING IN METHANE AND ETHANE
1. When carbon forms bonds, starting from a carbon atom, you can think of the bond formation
happening in the following stages:
promotion of an electron
hybridisation
formation of molecular orbitals
When carbon forms methane, CH
:
4
a) Explain what happens when an electron gets promoted.
b) Describe what is meant by hybridisation, and name the type of hybrid orbitals formed.
c) Describe what happens when the hybridised carbon atom combines with hydrogen atoms.
d) Why is methane tetrahedral in shape?
2. Now describe the bonding in ethane, C
H
, starting from carbon and hydrogen atoms. You don't
2
6
need to discuss the shape of an ethane molecule.

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