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- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/04%3A_The_Structure_of_Atoms/4.08%3A_RadiationJust prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that ...Just prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that compounds of uranium and thorium emitted rays which, like rays of sunlight, could darken photographic films. Although themselves invisible to the human eye, the rays could be detected easily because they produced visible light when they struck phosphors such as impure zinc sulfide.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/ChemPRIME_(Moore_et_al.)/04%3A_The_Structure_of_Atoms/4.13%3A_Transmutation_and_RadioactivityTransmutation of one element into another requires a change in the structures of the nuclei of the atoms involved.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Nuclear_Chemistry/Radioactivity/Transmutation_of_the_ElementsAlthough the conversion of one element to another is the basis of natural radioactive decay, it is also possible to convert one element to another experimentally. The conversion of one element to anot...Although the conversion of one element to another is the basis of natural radioactive decay, it is also possible to convert one element to another experimentally. The conversion of one element to another is the process of transmutation.
- https://chem.libretexts.org/Courses/Duke_University/CHEM_210D%3A_Modern_Applications_of_Chemistry/3%3A_Textbook-_Modern_Applications_of_Chemistry/01%3A_Primer/1.01%3A_The_Structure_of_Atoms/1.1.07%3A_RadiationJust prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that ...Just prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that compounds of uranium and thorium emitted rays which, like rays of sunlight, could darken photographic films. Although themselves invisible to the human eye, the rays could be detected easily because they produced visible light when they struck phosphors such as impure zinc sulfide.
- https://chem.libretexts.org/Courses/Hope_College/CHEM_125/Exam_I/03%3A_The_Structure_of_Atoms/3.08%3A_RadiationJust prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that ...Just prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that compounds of uranium and thorium emitted rays which, like rays of sunlight, could darken photographic films. Although themselves invisible to the human eye, the rays could be detected easily because they produced visible light when they struck phosphors such as impure zinc sulfide.
- https://chem.libretexts.org/Bookshelves/Environmental_Chemistry/Green_Chemistry_and_the_Ten_Commandments_of_Sustainability_(Manahan)/15%3A_Sustainable_Energy-_The_Essential_Basis_of_Green_Systems/15.10%3A_Nuclear_EnergyAnd since physicists have been trying to make it work on a practical basis for the last approximately 60 years, it will probably never be done. (Within about 15 years after the discovery of the phenom...And since physicists have been trying to make it work on a practical basis for the last approximately 60 years, it will probably never be done. (Within about 15 years after the discovery of the phenomenon of nuclear fission, it was being used in a power reactor to propel a nuclear submarine.) However, the tantalizing possibility of using the essentially limitless supply of deuterium, an isotope of hydrogen, from Earth’s oceans for nuclear fusion still give some investigators hope of a practical…
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/04%3A_The_Structure_of_Atoms/4.13%3A_Transmutation_and_RadioactivityTransmutation of one element into another requires a change in the structures of the nuclei of the atoms involved.
- https://chem.libretexts.org/Courses/Duke_University/CHEM_210D%3A_Modern_Applications_of_Chemistry/3%3A_Textbook-_Modern_Applications_of_Chemistry/02%3A_Nuclear_Chemistry/2.05%3A_Transmutation_and_RadioactivityTransmutation of one element into another requires a change in the structures of the nuclei of the atoms involved.
- https://chem.libretexts.org/Ancillary_Materials/Worksheets/Worksheets%3A_General_Chemistry/Worksheets%3A_General_Chemistry_(Traditional)/Nuclear_Kinetics_(Worksheet)The sum of the mass and energy of the reactants are equivalent to the sum of the mass and energy of the products. Using N to represent the number of atoms of the radioactive isotope, we can define the...The sum of the mass and energy of the reactants are equivalent to the sum of the mass and energy of the products. Using N to represent the number of atoms of the radioactive isotope, we can define the rate of decay of the sample, which is also called its activity (A) as the decrease in the number of the radioisotope’s nuclei per unit time (note that activity is a rate):
- https://chem.libretexts.org/Bookshelves/General_Chemistry/General_Chemistry_Supplement_(Eames)/Chemistry_Basics/AlchemyAir is a mixture, not a pure substance, because it contains different types of molecules, some of which are compounds, like carbon dioxide, which is a compound of carbon and oxygen. The difference bet...Air is a mixture, not a pure substance, because it contains different types of molecules, some of which are compounds, like carbon dioxide, which is a compound of carbon and oxygen. The difference between a compound and a mixture is that in a compound you always have the same ratio of the elements: in carbon dioxide, the ratio is there in the name: one carbon atom, two (di) oxygen atoms.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/ChemPRIME_(Moore_et_al.)/04%3A_The_Structure_of_Atoms/4.08%3A_RadiationJust prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that ...Just prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that compounds of uranium and thorium emitted rays which, like rays of sunlight, could darken photographic films. Although themselves invisible to the human eye, the rays could be detected easily because they produced visible light when they struck phosphors such as impure zinc sulfide.
