92
This statement is incorrect. Synthetic elements are created in laboratories, and can have any number of protons. For example, elements like americium (95 protons) and seaborgium (106 protons) are synthetic.
All of the actinides are radioactive, and almost all are synthetic.
These elements are found after uranium.
Synthetic elements are found in the group of transuranium elements, which are elements with atomic numbers higher than uranium (92) on the periodic table. These elements are artificially created in a laboratory through nuclear reactions and have unstable nuclei.
Today natural elements are considered the elements up to the atomic number 98; but the elements with atomic numbers 43, 61 and 93-98 exist only in extremely traces, as a curiosity in uranium deposits.
All the synthetic elements on the Periodic Table appear after Uranium (atomic no. 92). These are the only synthetic elements.
Yes, all synthetic elements are man made.
This statement is incorrect. Synthetic elements are created in laboratories, and can have any number of protons. For example, elements like americium (95 protons) and seaborgium (106 protons) are synthetic.
Radioactive
Sythetic elements are those with half lifes to small to be found in nature, they are manmade and generally fairly unstable. The synthetic elements are: All elements with atomic numbers 1 through 98 are naturally occurring at least in trace quantities, but the following elements are usually produced through synthesis. Except for francium, they were all discovered through synthesis before being found in nature.Element nameChemical SymbolAtomic NumberFirst definite discoveryTechnetiumTc431936PromethiumPm611945AstatineAt851940FranciumFr871939NeptuniumNp931940PlutoniumPu941940AmericiumAm951944CuriumCm961944BerkeliumBk971949CaliforniumCf981950 The following elements do not occur naturally on Earth. All are transuranium elements and have atomic numbers of 99 and higher. Element nameChemical SymbolAtomic NumberFirst definite synthesisEinsteiniumEs991952FermiumFm1001952MendeleviumMd1011955NobeliumNo1021966LawrenciumLr1031961RutherfordiumRf1041966 (USSR), 1969 (USA) *DubniumDb1051968 (USSR), 1970 (USA) *SeaborgiumSg1061974BohriumBh1071981HassiumHs1081984MeitneriumMt1091982DarmstadtiumDs1101994RoentgeniumRg1111994CoperniciumCn1121996UnuntriumUut1132003FleroviumFl1141999UnunpentiumUup1152003LivermoriumLv1162000UnunseptiumUus1172010UnunoctiumUuo1182002
All of the actinides are radioactive, and almost all are synthetic.
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.
These elements are found after uranium.
Technetium (43), Promethium (61), and all the transuranic elements are synthetic.
Synthetic elements are found in the group of transuranium elements, which are elements with atomic numbers higher than uranium (92) on the periodic table. These elements are artificially created in a laboratory through nuclear reactions and have unstable nuclei.
a synthetic element is not naturally found in the earth, they are handmade elements. OR elements that do not occur naturally and that are made in laboratories.
All elements have a useful purpose, including the synthetic actinides that have half-lives measured in milliseconds.