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Why are the nuclei of elements with atomic numbers greater than 82 naturally radioactive?
Wiki User
∙ 10y ago
Massive nuclei are unable to remain bound aganst the repulsive force of their protons, which all have positive charge. This also occurs with elements #43 (technetium) and #61 (promethium) which because of their particular nuclear geometry are inherently unstable and radioactive, with the only natural isotopes having half-lives of just over 2 years.
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∙ 10y ago
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What is the definition of radioactivity?
Radioactivity is a term that refers to the emissions from atomic nuclei due to changes in those nuclei. Those changes will occur as a result of instability of isotopes of certain elements. These atoms have a nuclear structure that is inherently unstable for whatever reason. And any unstable nucleus will eventually decay in a manner characteristic of that particular atom (radioisotope). We term the activity associated with the natural changes due to nuclear instability radioactive decay. As you can guess, different things might appear as an expression of the radioactivity of a radioisotope, and they'll vary according to the radioisotope being inspected.We could say that the elements on the upper end of the periodic table are radioactive, and these elements, the ones beginning with bismuth, have no nuclear configurations that permit them to avoid instability and their eventual radioactive decay. Additionally, we know that there are isotopes of other elements (lighter ones) that are not stable, and these radioisotopes are radioactive and will decay in time. Lastly, there are the elements technetium and promethium, which are the only elements with atomic numbers below that of bismuth that have no stable isotopes.The emissions we might gather under the umbrella of radioactivity include both particulate radiation and radiation in the form of energy, or electromagnetic radiation. Your investigation of the instabilities associated with atomic structure and what it is that results is just beginning. Use the links below to check facts and learn more.
Is a real number a whole number?
No, not all. All numbers are Real Numbers. * * * * * All numbers are not real numbers: there are complex numbers and others. Also, all real number are not whole numbers. sqrt(2) or pi, for example are real numbers but not whole numbers.
What are the numbers in front of the notes in piano?
numbers why numbers it is letters {CDEFGABC
Why did it take white artists to start rock n roll?
During the middle of the 20th century, the white population had a disproportionate share of the country's wealth in the US and other countries, so provided greater purchasing power. White singers had greater earnings than black singers and more affluent audiences. As rock and roll became accepted by large numbers of young fans, the popularity extended to musicians and singers of all races.
When was Numbers - song - created?
Numbers - song - was created in 1981.
What are the atomic numbers 81-100?
Elements 89-100 are the Actinide series of elements, most of which are radioactive, and some of which can only be made artificially. Elements 81-88 are also likely to be radioactive, but are naturally occurring.
Is it true that transuranium elements are synthetic elements with atomic numbers greater than 92?
Yes. All elements classified after Element Atomic Number 92 (Uranium) (id est transuranium) are synthesised elements and can not be found naturally. They are also all radioactive, although this is the case for elements from elements 84 onwards.
What elements are radioactive?
Answerelements with a nonstable isotope or at least one naturally occurring isotope that is radioactive. AnswerAll elements have radioactive isotopes.There are a lot of radioactive elements: Technetium, Promethium, Polonium, Astatine, Radon, Francium...Here is the whole list: http://periodictable.com/Elements/Radioactive
Does europium occur naturally or is it synthetic?
It is natural. All elements with atomic numbers 92 and lower are naturally occurring.
Any element with an atomic number greater than 92 is?
All elements with atomic numbers greater than 83 are radioactive. All the nuclei of these elements are blown apart because of their enormous positive charges.
How has the amount of earths radioactive isotope changed over time?
Many elements have naturally occurring isotopes, varieties of the element that have different numbers of neutrons in the nucleus.
Why are Elements whose atomic numbers are greater than 92 are sometimes referred to as the transmutation elements?
Because no element with an atomic number greater than 92 occurs naturally; any such element is made by transmutation of another element.
How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
What is unknown radioactive elements?
A radioactive element is the element which radiates continuously giving alpha, beta, and gamma rays. The elements having atomic no. more than 82 are mostly considered as radioactive elements. These elements emit radiations by themselves even if if they are not get touched. They are discovered by Maria Curie and Pierre Curie in 1907
What are radioactive elements on the periodic table?
In general, the elements with higher atomic numbers are the most radioactive and they are found at the bottom of the Periodic Table of Elements
List of radioactive elements?
Elements that decay (give off protons and neutrons) to form other elements. *It's not elements as such that are stable or unstable, but rather isotopes. Even elements of small atomic number have unstable isotopes that undergo radioactive decay, for example carbon-14. Elements with higher atomic numbers than Lead (82) are naturally radioactive in all isotopes. Bismuth (83) has an extremely long half-life, but the time generally becomes shorter (the decay more rapid) as the size of the nucleus gets progressively larger for heavier radioactive elements.
What are Lanthanides and Actinides?
Elements. The Lanthanides are: Atomic No.575859606162636465666768697071NameLaCePrNdPmSmEuGdTbDyHoErTmYbLu The Actinides are:Atomic No.8990919293949596979899100101102103NameAcThPaUNpPuAmCmBkCfEsFmMdNoLr
