| 1 | We have a helium nucleus and one electron. | |
| 2 | So, helium plus is a one electron system. | |
| 3 | So what is the charge on a helium nucleus? | |
| 4 | For more than a century, helium has been as American as apple pie. | |
| 5 | The ingredient is helium 3, an unusual form of the element that is formed when tritium, an ingredient of hydrogen bombs, decays. |