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Which elements have no useful purposes at all?

All elements have a useful purpose, including the synthetic actinides that have half-lives measured in milliseconds.


What is the half life of a radioistope?

The half-life of every isotope is different. Some elements and isotopes have half-lives in millions of years, while some elements have half-lives measured in milliseconds. You can look up all of the specifics for any element at webelements dot com.


Do all isotopes have the same half lives?

Yes, all elements have at least one radioactive isotope. Hydrogen has two isotopes, Deuterium and Tritium. H3 has a half life of 12.3 years. Not all isotopes are radioactive. About half way up the atomic mass table, Tin appears to have the greatest number of stable isotopes - ten out of about 124 isotopes in all.


Do all elements have a half-life?

No, not all elements have a half-life. Half-life is a property of radioactive elements that undergo decay over time. Non-radioactive elements do not have a half-life because they do not decay in the same way.


Do all elements half half lifes?

yes they do


What is special about all the elements beyond uranium on the periodic table?

Elements beyond uranium are known as transuranium elements, which are all synthetic and unstable. They are typically produced in laboratories through nuclear reactions and have very short half-lives. These elements are important for scientific research into nuclear structure and properties.


What is a transuranium metal?

elements that have a higher atomic number than the element Uranium (92). Twenty have been discovered and they are all unstable with half-lives


Do all elements have half life's?

Yes. From a technical point of view, all elements have isotopes (nuclides) that are radioactive and therefore have half-lives. But the majority of these are artificial - man made, and do not occur in nature on Earth. Even hydrogen has nuclides of deuterium and tritium, deuterium is stable and natural, and tritium has a half life of 12.33 years. Having said that, there are a number of nuclides that are stable and occur naturally.


How many half lives does it take for half of a radioisotope to dissipate?

It depends on the radioisotope. They do not all have the same half life.


What is the range of half-lives of different radioactive element?

It would be quite difficult to list all radioactive elements and their half lives in this area. Lithium 5 has a half life of about a trillionth of a second. Uranium 238 has a half life of about 4.7 billion years. Since the world is about 4.2 billion years, over half the Uranium 238 is still around. The first element in the Periodic Table, Hydrogen, has a radioactive form, Hydrogen 3. It has a half life of about Twelve and a half years. Helium has a radioactive form, Helium 5. It's half life is a trillionth of a second. Then you get to elements with different radioactive isotopes. You will need to look them up in a handbook. Tin is the element with the most isotopes.


Why is astatine is the rarest element on the earth?

Astatine is the rarest naturally occuring element on Earth because all its isotopes are radioactive with very short half-lives. The most stable, At-210 has a half-life of 8 hours, so any astatine that forms (by radioactive decay of heavier elements) quickly decays to other elements.


When smoking half a joint to save the other half for later how do you kill half a joint?

ye dont smoke it all