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2010-01-22 08:12:52
2010-01-22 08:12:52

Carbon-14 is produced in the upper atmosphere when cosmic rays produce thermalised neutrons, by hitting atomic nuclei. If these thermalised neutrons then hits a Nitrogen neuclei it creates Carbon 14.


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Carbon 14 is an isotope of cosmogenic origin; the reaction is: 1n + 14N → 14C + 1p

It is produced in the atmosphere, by radiation from outer space.

Carbon-14 forms in the upper atmosphere, when a nitrogen atom is converted to an atom of carbon and atom of hydrogen by the addition of a neutron; 14N + 1n ---> 14C + 1H.

Carbon-14 (C-14) is a rare isotope of carbon produced in the upper atmosphere when a cosmic ray strikes an atom of nitrogen. Carbon-14 is radioactive undergoing beta decay to nitrogen-14 with a halflife of 5570 years. Because it is produced at a near constant rate and living organisms maintain the same percentage of it as is present in the atmosphere while they are alive, but after an organism dies it can no longer equalize the amount of the carbon-14 in its tissues, this isotope's decay can be used as a "clock" to measure the time since the organism died.

Carbon-14 is produced by the effect of solar radiation on nitrogen-14 in the atmosphere. This is then incorporated into plants during the process of photosynthesis. Animals eat plants (and/or other animals that have eaten plants), so carbon-14 gets into their bodies as well.

Carbon-12 (98.93%), Carbon-13 (1.07%), and Carbon-14 (1 PPT) all occur naturally. However, Carbon-14 is radioactive (halflife 5,730±40 years) and is being produced only high in the atmosphere by bombardment of nitrogen gas by cosmic rays.

This is how carbon dating works: Carbon is a naturally abundant element found in the atmosphere, in the earth, in the oceans, and in every living creature. C-12 is by far the most common isotope, while only about one in a trillion carbon atoms is C-14. C-14 is produced in the upper atmosphere when nitrogen-14 (N-14) is altered through the effects of cosmic radiation bombardment (a proton is displaced by a neutron effectively changing the nitrogen atom into a carbon isotope). The new isotope is called

"It is produced naturally in the upper atmosphere by the action of cosmic rays on nitrogen 14 atoms. The reaction is given in the linked article. Once produced, the atoms diffuse down to the biosphere, where it gets incorporated into all living things. Rock deposits that contain carbon, including oil and gas deposits, do not contain any carbon-14: with a half life of 5730 years, it has already decayed. It only makes up about 1 part-per-trillion of carbon on the Earth."

Cosmic rays bombard the upper atmosphere (see Carbon 14 wiki): "Carbon-14 is produced in the upper layers of the troposphere and the stratosphere by thermal neutrons absorbed by nitrogen atoms. When cosmic rays enter the atmosphere, they undergo various transformations, including the production of neutrons. The resulting neutrons (1n) participate in the following reaction: : 1n + 14N → 14C + 1H"

in the atmosphere, in living things, in dead things.

It goes into the atmosphere as carbon dioxide. The heat produced by burning fuel comes from forming the carbon-oxygen chemical bonds that creates CO2.

Coal and wood actually produce fairly similar amounts of carbon dioxide when burnt. However, the carbon dioxide produced from the wood originally came from the atmosphere and was converted by the original tree into wood - so burning the wood simply returns this to the atmosphere and there is no net increase in the amount of carbon dioxide in the atmosphere. When we burn coal, the carbon dioxide is produced from carbon that had been sequestered underground for millions of years, so by this means we do add new carbon dioxide to the atmosphere.

Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.

Carbon isn't - it's not a gas or vapour. It is present in (rather obviously) the compound Carbon Dioxide, produced by animals' respiration, by combustion or by decomposition.

Carbon dioxide (CO2) is the main gas produced by human activity that is causing the atmosphere to grow warmer.

I am guessing a bit here, but sugar molecules are produced in plants and plants get their carbon atoms from carbon dioxide gas in the atmosphere.

Biomass is a form of carbon fuel that is produced by biological processes that absorb carbon dioxide from the atmosphere. Burning the fuel reforms that carbon dioxide to produce heat. Because the carbon goes round in a short-term cycle, the atmosphere suffers no damage.

Carbon-14, a naturally occurring isotope of carbon in the atmosphere. After death, a living thing does not take in nutrients from the atmosphere and thus do not take in Carbon-14, thus the carbon-14 in their body start to diminish at a predictable rate. By measuring the amount of carbon-14 left in a dead matter, the time since death can be determined. Note that this method is only accurate up to 60,000 years old.

Carbon is produced in the cores of suns via stellar nucleosynthesis. Some carbon 14 is created in our atmosphere by cosmic ray bombardment of nitrogen, but that carbon is transient, decaying back to N14 by beta particle emission with a half life of some 5000 years. Essentially as much is created as is destroyed, so C14 is somewhat in equilibrium. So no new carbon is produced on earth, nor in our sun, which is not a massive enough for carbon fusion. Big red giants, far away, make all new carbon.

Carbon-14 is produced in the upper layers of the troposphere and the stratosphere by thermal neutrons absorbed by nitrogen atoms. When cosmic rays enter the atmosphere, they undergo various transformations, including the production of neutrons. The resulting neutrons (1n) participate in the following reaction: : 1n + 14N → 14C + 1H The highest rate of carbon-14 production takes place at altitudes of 9 to 15 km (30,000 to 50,000 ft) and at high geomagnetic latitudes, but the carbon-14 readily mixes and becomes evenly distributed throughout the atmosphere and reacts with oxygen to form radioactive carbon dioxide. Carbon dioxide also dissolves in water and thus permeates the oceans

Cows have little affect on the atmosphere compared to human activity. The carbon dioxide and methane emissions produced by cattle thriough belching and flatulence are considered insignificant compared to the amount produced by humans.

Carbon is removed from the atmosphere in some ways. For example, plants and trees eliminate carbon from the atmosphere through photosynthesis. Carbon will be released into the atmosphere when an organism dies.

Carbon Dioxide in the atmosphere or in soil gases dissolves in water: CO2 + H2O => H2CO3 carbon dioxide + water => carbonic acid

the carbon cycle is the process to return carbon in the atmosphere

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