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The number of nucleons (protons and neutrons). Since both protons and neutrons are pretty close to one atomic mass unit, it's also approximately the mass of the atom.

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What does the '238' in uranium 238 and the '14' in carbon 14 mean?

They represent the number of nucleons.


What do the '238' in uranium-238 and the '14' in carbon-14 mean?

The numbers in uranium-238 and carbon-14 refer to the atomic mass of the isotopes. The number '238' indicates that uranium-238 has a total of 238 protons and neutrons in its nucleus, while the number '14' indicates that carbon-14 has a total of 14 protons and neutrons.


Which two substances do geologist use in radiocarbon dating?

Geologists use carbon-14, an isotope of carbon, and nitrogen-14 in radiocarbon dating. Carbon-14 is absorbed by all living organisms during their lifetime, and by measuring the ratio of carbon-14 to nitrogen-14 in a sample, geologists can determine its age.


When carbon 13 decays into carbon 14?

Carbon 13 is stable; it does not decay into carbon 14. Since carbon 14 has a greater mass, such a decay would be impossible.


What are the top and bottom numbers of carbon-14?

If you mean the 146C, the bottom number (6) indicates the total number of protons. This is always 6 in the case of carbon. The top number is the sum of protons and neutrons, which for this particular isotope is 14 (i.e., carbon-14 has 8 neutrons).


What is radioisotope carbon dating?

Carbon 14 is the isotope that is used for carbon dating.


Is the daughter element of carbon-14 nitrogen?

Yes, the daughter element of Carbon-14 isNitrogen-14.


What colour is carbon 14?

Carbon-14 itself is a radioactive isotope of carbon and does not have a distinct color. In its natural state, carbon-14 would not have a visible color.


Carbon belongs to what family?

The carbon family is often referred to as the "Carbon Family". Boring, but true.


What is the comparison for the structures of carbon-12 and carbon-14?

Carbon -14 has extra two neutrons and is radioactive.


What are three isotopes and isobars of carbon?

isotopes of carbon are atomic no. 6 mass 12 , atomic no.6 mass 13 , atomic no. 6 mass 14


Is carbon 14 a gas?

Every isotope of carbon is a solid at standard temperature and pressure.