The National Geographic Magazine, Volume 114National Geographic Society, 1958 - Geography Indexes kept up to date with supplements. |
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Page 238
The relative number of carbon - 14 atoms , compared with normal carbon - 12 , is extremely small . In living wood , for example , only one out of a trillion ( million million ) carbon atoms is radioactive . Only through the use of mod- ...
The relative number of carbon - 14 atoms , compared with normal carbon - 12 , is extremely small . In living wood , for example , only one out of a trillion ( million million ) carbon atoms is radioactive . Only through the use of mod- ...
Page 240
Neutrons collide with atmospheric nitrogen atoms , producing tiny amounts of carbon - 14 and hydrogen . Neutron Nitrogen atom Carbon - 14 Hydrogen Carbon - 14 combines with oxygen to become carbon dioxide contain- ing carbon - 14 .
Neutrons collide with atmospheric nitrogen atoms , producing tiny amounts of carbon - 14 and hydrogen . Neutron Nitrogen atom Carbon - 14 Hydrogen Carbon - 14 combines with oxygen to become carbon dioxide contain- ing carbon - 14 .
Page 247
What has happened is clear : Bombs have added to the radiocarbon of the atmosphere , and plants quickly pick up the increased radio- carbon as they breathe in carbon dioxide . Snails eat the leaves , and their constantly changing body ...
What has happened is clear : Bombs have added to the radiocarbon of the atmosphere , and plants quickly pick up the increased radio- carbon as they breathe in carbon dioxide . Snails eat the leaves , and their constantly changing body ...
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Contents
Poseidons Playground Sailing in Grecian waters sprinkled with | 403 |
New Atlas Map Links Roman and Atomic Times in the British Isles Text | 408 |
Vibrant Heart of France 15 illustrations with full legends twopage map 285 | 415 |
Copyright | |
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