Question
Aluminum exists in several isotopic forms, including$_{13}^{27} A l$,$_{13}^{28} A l$ and ,$_{13}^{29} A l$ Indicate the number of protons and the number of neutrons in each of these isotopes.
Step 1
It is given in the subscript of the element symbol. For all three isotopes of Aluminum, the atomic number is 13. So, all three isotopes have 13 protons. Show more…
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