|
|
|
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
Physical Environment > Alpha Particles |
This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
|
Alpha particles were formed by nuclear fusion in the big bang. They are also made in stars during the main part of their lives. About one quarter of the mass of the Universe is in this form.
When an alpha particle gains two electrons it becomes a helium atom. Therefore alphas are often called helium nuclei. An alpha particle is a very stable combination of two protons and two neutrons. |
|
| Like this web site? Buy the book! |
Physical Environment > Alpha Particles |
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
