Talk:Carbon-12
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| Carbon-12 | |
|---|---|
| [[Image:{{{isotope_filename}}}|250px|]] |
|
| General | |
| Name, symbol | Carbon-12, 12C |
| Neutrons | 6 |
| Protons | 6 |
| Nuclide Data | |
| Natural abundance | 98.9% |
| Half-life | stable |
| Isotope mass | 12 u |
| Spin | 0+ |
| Excess energy | 0.000 ± 0.000 keV |
| Binding energy | 92161.753 ± 0.014 keV |
Jclerman 02:03, 15 May 2006 (UTC)
[edit] Arbitrary choice for mole definition?
Is there any reason why Carbon-12 was chosen as the basis of the mole and amu? Can someone please clarify if this was arbitrary? Glueball 15:52, 14 January 2007 (UTC)
- Maybe this article can ask you: Atomic mass unit
- The unit is convenient because one hydrogen atom has a mass
of approximately 1 u, and more generally an atom or molecule that contains n protons and neutrons will have a mass approximately equal to n u. (The reason is that a carbon-12 atom contains 6 protons, 6 neutrons and 6 electrons, with the protons and neutrons having about the same mass and the electron mass being negligible in comparison.)
- Remember that 1 u = 1/12 of the Carbon-12 real mass. --Daniel bg 16:48, 14 January 2007 (UTC)
