| 31. | It consists of old stars deficient in heavy elements.
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| 32. | These heavy elements allow the formation of rocky planets.
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| 33. | Fission uses heavy elements, while fusion uses the lightest elements of the isotopes of hydrogen.
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| 34. | The Martians use copper, human blood and heavy elements.
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| 35. | Then you may find a lack of heavy elements needed to make planets and humans.
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| 36. | However, in the case of 24 Aquilae, the abundances of heavy elements are near normal.
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| 37. | Planetary nebulae play a crucial role in the heavy elements and other products of nucleosynthesis.
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| 38. | Physicists who study the nuclear structure of atoms have been seeking super-heavy elements for decades.
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| 39. | The star is not particularly noteworthy with exception to its enormously high heavy element content.
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| 40. | Where did the heavy elements on Earth come from?
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