Total number of protons and neutrons in the nucleus., Nucleon number, Number written at the top of the standard representation of an atom., Nucleon number (A), Number written at the bottom of the standard representation of an atom., Proton number (Z), Symbol used to represent an element in the standard representation of an atom., Element symbol (X), Outermost occupied shell of an atom., Valence shell, Electrons found in the outermost occupied shell., Valence electrons, Atoms of the same element with different nucleon numbers., Isotopes, Isotope used in radiotherapy to destroy cancer cells., Cobalt-60, Isotope used to diagnose and treat thyroid disorders., Iodine-131, Isotope used to estimate the age of fossils and ancient remains., Carbon-14, Isotope used to study fertiliser absorption in plants., Phosphorus-32, Isotope used to generate electricity in nuclear power stations., Uranium-235
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Atomic Identity
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