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What will be the correct electronic configuration of an Mg ion?
As the configuration of ion is asked, Mg forms ion Mg2+ after losing 2 electrons and so its electronic configuration is 2, 8.
A radioactive isotope that is used to cure cancer?
It emmits gamma rays which destroys cancer cells
What are isobars?
Isobars are atoms (nuclides) of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number (or number of protons) but have the same mass number