An unstable nucleus will undergo nuclear decay and change into a different nuclide having a different atomic number and/or mass number. There are a variety of nuclear decay modes that can occur, each resulting in a different amount of change in the atomic and mass numbers. Knowledge of the isotope symbol and the decay type, allows one to predict what the product isotope is.
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Nuclear Decay - help17
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Cesium-119 undergoes positron emission. Identify the atomic and mass number of the product isotope by tapping on the appropriate cell of the table.
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