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| The Atom Song | Youtube 3 minutes. Wonderful history of the atom. Best appreciated by Leaving Cert Chemistry students I suspect. | 5 Star | |
| The atom - to scale | Link | Web-page with electron and proton to scale. Scroll over to the extreme right to see the electron. |
4 Star |
| This must mean that we are almost completely empty space! | Link | Short video (1:15) trying to explain this |
4 Star |
| Why textbook depictions of the atom are wrong | Link | Youtube. 1:30. Pretty cool |
5 Star |
| And while you're at it check out the size of the Earth in comparison to other heavenly objects | Link | Single web page with images |
4 Star |
| Rutherford's Experiment | Link | Youtube. 3:30. Note that it took Rutherford TWO YEARS to make sense of his results. Includes a clip of the great man himself. |
5 Star |
| It kinda freaked him out | Link | Audio link. 1:30. But it's worth it to hear how much it freightened Rutherford. |
5 Star |
| Simulations | Link | Basic simulation of Rutherford's experiment to determine the structure of the atom. Remember Rutherford didn't know then what we know now. |
3 Star |
| Link | This is a variation on the above |
3 Star | |
| Link | Nice simulation |
4 Star | |
| Link | Nice animation from explorelearning.com | 4 Star | |
| Model of the atom | Link | Rutherford's model of a lithium atom. From absorblearning.com | 4 Star |
| Another video which looks at the issues in a little more detail | Link | Video from howstuffworks. 2 mins | 4 Star |
Absorption
and Emission Applets |
Nice n' Easy simulation. Energy comes in and bumps electron up to various levels. Can be downloaded
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4 Star |
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Note that the energy level to which the electron rises depends upon the wavelength (or frequency) of the incident photon |
4 Star |
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Absorption and Emission spectrums for all elements |
Click on each element to see its unique spectrum (its 'barcode'). |
4 Star |
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| Beautiful pictures of emission spectrums on flickr | Taken with a camera and a hand-held spectroscope. |
4 Star |
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How Kirchoff first discovered Spectroscopy |
From HowStuffWorks. 3 minutes |
4 Star |
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| Ionisation by alpha particle | Link | Nice animation from absorblearning.com |
4 Star |
| Ionisation by gamma radiation | Link | Nice animation from absorblearning.com |
4 Star |
| Penetration power of the three types of radiation | Link | Nice animation from absorblearning.com |
4 Star |
| Tissue penetration power of radiation | Link | Nice animation from absorblearning.com | 4 Star |
| The effect of a radioactive source on a charged gold leaf electroscope | Link | Nice animation from absorblearning.com | 3 Star |
| Various radiation detectors | |||
| Radioactive tabletops | Link | A report on the danger associated with granite counter-tops is dismissed by the experts. From The Irish Times. | |
| Isotopes and enriched uranium | Link | The relationship between isotopes and enriched uranium. YouTube 9 minutes. |
5 Star |
| Random Number Generator | Link | The only actual random number generator. Everything else is based on a program. |
5 Star |
| Using a Geiger Counter | Link | Very useful simulation for distinguishing beween alpha, beta and gamma radiation, but needs to be downloaded to your hard-drive to view
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5 Star |
| Alpha decay of radon | Link | Simple diagram | 3 Star |
| Alpha, beta, gamma penetration | Link | Simple diagram |
5 Star |
| Tissue penetration | Link | Simple diagram | 5 Star |
| Interactive chart of Radioactive Isotopes | Link | Also gives you corresponding Half-lives. Would have nice if they also told us what percentage of the element each isotope is. |
3 Star |
| Decay Chain | Link | Radioactive Decay Series. Can you identify whether the decay is alpha or beta in each case? |
3 Star |
| Link | Similar, from absorblearning.com |
3 Star | |
| Radioactivity Half-Life Graphs | Link1 | Graph of radioactive decay |
3 Star |
| Link2 | Same as above |
3 Star | |
| How much radiation are we exposed to every day? | Link | Three minute QuickTime Video.
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4 Star |
| Piechart illustrating the sources of natural radiation we are exposed to. | Link | From absorblearning.com | 3 Star |
| Radon gas in your home | Link | Three minute QuickTime Video. |
4 Star |
| Radon Gas (mainly from granite rock) | Link | Comprehensive (flash file) introduction to Radon gas. Focused on England. |
4 Star |
| Radon in Ireland | Link | Irish Radon page. Click on the map to see how your county fares. |
5 Star |
| Radiometric Dating | Link | Three minute QuickTime Video. You need to register
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4 Star |