Uranium isotopes with m in superscript

In summary, uranium isotopes with m in superscript are unstable forms of uranium that have a different number of neutrons compared to the most common form, uranium-238. Uranium-235 is the only naturally occurring isotope with m in superscript, while the rest are artificially produced in nuclear reactors. These isotopes have been extensively studied due to their role in nuclear energy production and their potential use in nuclear weapons. The most notable isotope, uranium-235, is highly sought after for its ability to sustain a chain reaction in nuclear fission. Its production and use are strictly regulated due to its potential for both peaceful and destructive purposes.
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nomadreid
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On the page https://en.wikipedia.org/wiki/Isotopes_of_uranium, some of the superscripts have, besides the atomic number, also an "m". For example, besides the usual isotope 234U with spin 0+, there is also the isotope 234mU (with nuclear spin 6-). What is this "m"?

While I am at it, what is the "+" next to the 0? +0 = -0, no? (It can't be the charge, given the "6-" for the other one.)
 
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m is abbreviation for "metastable". This signifies "nuclear isomers" - nuclear states which have higher energy than some other state of same neutron and proton number and relatively long half-life.
 
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thank you very much, snorkack. That completely answers the first question.
 
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nomadreid said:
While I am at it, what is the "+" next to the 0? +0 = -0, no? (It can't be the charge, given the "6-" for the other one.)
It is the parity. It is not a sign for the spin.
 
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Thanks very much, mfb. That completely answers the second question.
Super! both questions wonderfully answered.
 

1. What are Uranium isotopes with m in superscript?

Uranium isotopes with m in superscript are radioactive isotopes of Uranium that have a metastable state, meaning they have a longer half-life than the more common isotopes of Uranium.

2. How are Uranium isotopes with m in superscript formed?

Uranium isotopes with m in superscript are formed through nuclear reactions, typically in nuclear reactors or through the decay of other radioactive elements.

3. What is the significance of Uranium isotopes with m in superscript?

Uranium isotopes with m in superscript have important applications in nuclear energy, medical imaging, and scientific research. They also play a role in the production of nuclear weapons.

4. How do Uranium isotopes with m in superscript differ from other Uranium isotopes?

Uranium isotopes with m in superscript have a longer half-life and different decay properties compared to other Uranium isotopes. They also have different chemical and physical properties.

5. Are Uranium isotopes with m in superscript dangerous?

Yes, Uranium isotopes with m in superscript are highly radioactive and can be dangerous if not handled properly. They can emit harmful radiation and can pose a health risk if ingested or inhaled.

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