1.How many protons are in the nucleus of an aluminum atom? 2.How many electrons does an aluminum atom have?

There are 13 numbers in an aluminum atom and 13 electrons.

Explanation:

This is because the atomic number equals the number of protons and the atomic number of Al is 13.  The number of electrons also equals the number of protons.

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the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.