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We're not actually 100% certain that there are any elements that are absolutely not radioactive. Some Grand Unified Theories predict that protons are unstable over incredibly long timescales, and if so, no baryonic matter (all elements are baryonic matter) is stable over the very very long term.
The element with the highest atomic number having at least one isotope that is believed to be stable (provided that proton decay does not occur) is lead. 206Pb, 207Pb, and 208Pb are all stable both theoretically and according to the best measurements we can make. The most stable isotope of bismuth is 209Bi, which has an extremely long half-life: about 20,000,000,000,000,000,000 (2x1019) years. This is about 15,000,000,000 times longer than the current estimated age of the universe, and it's likely that no one would have noticed that bismuth-209 was radioactive if it hadn't been studied very closely because theoretical models predicted that it should be unstable. For all real-world applications, bismuth can be regarded as stable and non-radioactive.
This is still much, much shorter than the lowest possible bound on the (hypothetical) proton decay half-life, which recent experiments have indicated cannot be less than about 10,000,000,000,000,000,000,000,000,000,000,000 (1034) years.
What else can I help you with?
What element is a radioactive element?
The radioactive element is composed of unstable nuclei that try to reach stability through emitting nuclear radiations as alpha, beta, and gamma nuclear radiations.
Heaviest element that is highly radioactive?
The heaviest element that is highly radioactive is Ununoctium, which has an atomic number of 118.
What is radioactive disintegration series?
A disintegration series is the pathway of a radioactively unstable element into a stable element. The pathway alters the atomic number of the element and converts the element into another element. A common one is the uranium disintegration series.
The nucleus of a radioactive element does not break down and give off particles and energy?
false
What is the radioactive element of group 17?
Bromine (Br) is a liquid Iodine (I) is a solid
Is the element sodium radioactive or non-radioactive?
non radioactive element
Is the element thulium radioactive or non-radioactive?
Thulium is a non-radioactive element. It is part of the lanthanide series on the periodic table and has no stable isotopes that are radioactive. Thulium-169, the most common isotope, is stable and does not undergo radioactive decay. Therefore, thulium is considered non-radioactive.
Does uranium exist in a stable non-radioactive form?
All the isotopes of uranium are radioactive and unstable.
What element does the element bismuth belong to?
The element Bismuth (Bi) belongs to the Nitrogen family (Group 15). This means it has similar characteristics to other elements in this family. Bismuth is atomic number 83 and the last non-radioactive element.
What happens when radioactive element decays?
When a radioactive element decays, it releases energy in the form of radiation (such as alpha or beta particles). The decay changes the element into a different element or isotope, which may also be radioactive. This process continues until a stable non-radioactive element is formed.
What is the toxic radioactive metallic element that occurs in small quantities as a decay product of uranium?
All the decay chain isotopes are radioactive and toxic (excepting the last member which is non-radioactive but also toxic); you think probably to radium or polonium.
Do radioactive atoms have different atomic weights than non radioactive atoms of the same element?
yes
When a different kind element that radioactive is mixed with another element that not radioactive does it react?
Of course. Chemistry still applies, and that is based on the electron configuration, not the nucleus, per se.
Is carbon an stable element?
Carbon is non-radioactive excepting the isotope carbon-14.
Is Iodine a non-radioactive metal?
No: Iodine is not a metal at all, but a nonmetal. It is not necessarily radioactive, but has some radioactive isotopes.
If you had a stable element 115 could you then have an isotope of it that would be non-radioactive?
If you had a stable element 115, then by definition there would need to be at least one non-radioactive isotope. Stable elements are those that have at least one nonradioactive isotope. Of course, the other isotopes of the element could all be radioactive.
How does a sample of radioactive waste decay to a nonhazardous level?
All radioactive material has a characteristic half-life. This is a period during which half the matter from the original mass will have decayed into a daughter element. Either the daughter element is non-radioactive and therefore non-hazardous or it is radioactive and has its own half-life. The total radioactivity thus reduces over time and at some stage is deemed to reach a non-hazardous level.
