Hi. I am not sure which version you have, so I hope the steps are similar. I have version 2000 and will be using a basic column chart.
1. Insert the chart, go to series tab
2. Click the Add button, name your series 1 au
3. Click in the Values box and highlight the cells for au
4. Look for, and click inside the Category (X) axis labels box
5. Highlight the cells for your nanometers, click OK
Of course you can always tweak the range on your Y axis (au), by clicking on the value axis>format>scale then replace your numbers as far as max., min, major and minor.
I'm sure you already know this but, under chart options you can title your chart and give a name to both x & y axis, and remove the legend as another option.
Hope that helped. If you are still having problems, please feel free to email me as I am always glad to help out.