Posted by **Jessica** on Monday, September 30, 2013 at 1:56pm.

What is the major difference between the two-dimensional and three- dimensional models of ethane and methane? When might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules?

- chemistry -
**DrBob222**, Monday, September 30, 2013 at 2:33pm
The major difference is that the two-dimensional model doesn't show the C-H angles. For example, three-dimensional models are needed to show stereo-isomerism

- Chemistry -
**Emalee**, Thursday, October 30, 2014 at 2:13pm
3D - more specific and harder to draw, 2D - much easier and provides more details.

I sort of dragged it out for you :)

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