|
Appendix eleven
Cosmic Abundance of the Elements
| element |
number of atoms relative to 1 million
atoms of hydrogen |
| hydrogen |
1000000 |
| helium |
63000 |
| oxygen |
690 |
| carbon |
420 |
| nitrogen |
87 |
| silicon |
45 |
| magnesium |
40 |
| neon |
37 |
| iron |
32 |
| sulphur |
16 |
------------------------------------------
|