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Radioactive elements include all those elements whose nuclei contain what?
Wiki User
∙ 13y ago
Radioactive elements include all elements whose nuclei either:
- contain protons more than 83 proton, or
- contain neutron to proton ratio out of the stability ratio.
refer to related question below.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoRadioactive elements include all of those elements whose nuclei contain more than 83 protons. These elements are so heavy that they become unstable, and this causes their radioactive property.
Wiki User
∙ 14y ago100% sure its actinides
Wiki User
∙ 14y agomore than 83 as an atomic number.
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How do radioactive elements produce their own energy?
The energy released in a radioactive decay arises because the nucleus is moving from one energy level to a lower energy one. The link below gives a good outline explanation in the Explanation section.
Why do some isotopes of elements spontaneously undergo radioactive decay?
Nuclei undergo radioactive decay in order to release some of the "stress" in the atom. At a certain point, the nucleus of an atom gets too large to sustain all of those protons and neutrons. When the "stress" is relieved, a phenomenon called radioactive decay occurs.
What is the spontaneous process through which unstable nuclei emit radiation?
Radioactive decay or radioactivity
What term indicates the process in which unstable nuclei releases radiation?
The term is "radioactive decay".
What happens to a radioactive material over time?
It disintegrates into its daughter nuclei that are much more stabler than the radioactive nuclei. If a sample of radioacictive material is left it will decay into another element over a period of time. Note that complete decay is not possible. A fraction of the original radioactive material will always remain in the sample.
What elements have more than 92 protons in their nuclei?
radioactive.
What is a stream of helium nuclei ejected by certain radioactive elements?
alpha radiation
Are some elements radioactive?
Radioactivity refers to the emission of ionizing particles which results from the spontaneous disintegration of atomic nuclei. Some examples of radioactive elements are uranium and plutonium.
Why do heavy elements neclei contain proportionally more neutrons than light element nuclei?
It is for this reason that large nuclei contain proportionally more neutrons than light elements
What are the elements of radioactivity?
Some of the elements on the Periodic Table are Radioactive. This means that their nuclei decay to form other elements in a decay chain. There are currently 33 known radioactive elements of which 20 are currently produced synthetically.
Are the nuclei of final elements produced by nuclear decay more stable or less stable than the nuclei of original radioactive elements?
Of course they are more stable, therefore they formed naturally.
What is the source of the radioactive nuclei present in spent rods?
The nuclear fission process produces a range of lighter elements as fission products, and many of these are radioactive.
Why radioactive materials are unstable?
Radioactive metals are unstable as their nuclei is large and do not have a strong binding force as the smaller elements. If a neutron is collided onto a radioactive nuclei, they split into smaller atoms like Uranium splits into Barium and Krypton. Since they are unstable, they have a half life of varying times which range from the age of the earth to nanoseconds for recently discovered elements
Where do the two neutrons and two neutrons that consist on alpha particle come from?
they come from the nuclei of an unstable atom.
Elements after which element are radioactive?
The atoms that are radioactive are those with unstable nuclei. There is no easy way to tell which is which, so the isotope has to be looked up. All elements have at least some radioactive isotopes. There are 36 elements for which all radioactive isotopes are synthetic or fission products, so for practical purposes, there are no radioactive isotopes of them in nature, except where introduced by human activity. They include most of the common elements we find in nature, but not all. There are 44 elements that are found as stable isotopes, but at least traces of radioactive isotopes are found in nature. Among these are hydrogen, carbon, sodium, silicon, chlorine, and potassium, all of which are necessary for life. Radioactive potassium, in particular, is present as 0.012% of all potassium. For another group of elements, including technetium, promethium, and all with atomic numbers of 83 (bismuth) or more, there is no isotope that is stable.
Does radioactive isotopes have a stable nuclei?
Radioactive isotopes are not stable.
Radioactive substances consist of nuclei that can't be held together by the what?
Radioactive substances consist of nuclei that can't be held together by the strong force.
