14 . For this part you will need to access the PhET simulation https ://phet.colorado.edu /en /simulation /atomic -interactions ) and click on the play arrow. Click on the button to reset the simulation and then click the radial button at the top beside Argon (pinned atom) - Argon (moving atom). i. Comparing the graphs for Ar-Ar and Ne-Ne, what difference do you notice about the relative depths of the PE well ? (Be sure to zoom in as far as possible for the Ar-Ar so that you can compare Ar and Ne directly. You may want to flip back and forth between the Ne-Ne and Ar-Ar to see this clearly.) ii. Which would require the input of more energy separating 2 Ne atoms or separating 2 Ar atoms? Provide evidence from the simulation to support your answer. iii . What does this tell you about the relative strength of the interactions between 2 Ar atoms vs. 2 Ne atoms ? i. Why might this difference make sense given your knowledge what causes the attractive forces between two atoms [Ne (Z=10 ) and Argon (Z=18 )]? iv . What difference do you notice about the most stable distance for two Ar atoms compared to the two Ne atoms ? i. Why might this difference make sense given your knowledge of the relative atomic sizes of Ne (Z=10 ) and Argon (Z=18 )? 15. Use the simulation to investigate the combinations listed below . Are these more like Neon- Neon interactions or Oxygen - Oxygen interactions ? (Put an X in the appropriate box .)