The element aluminum has an atomic number of 13. There are thirteen protons that are present in the nucleus of an aluminum atom. There are thirteen electrons present in an aluminum atom which is equal to the number of protons because aluminum is an electrically neutral atom.
What is the atomic number?
An atom's atomic number is determined by the total number of protons it contains. Both the number of neutrons and the number of electrons present inside an atom have no relation to the atomic number.
For any neutral atom, the total number of protons is equal to the total number of electrons, which is the same as the atomic number of the atom.
The atomic number of the substance aluminum is 13. An atom of aluminum contains thirteen protons in its nucleus. Due to the fact that aluminum is an electrically neutral atom, the number of electrons in an atom is equal to the number of protons, or thirteen.
Thus, There are 13 protons present in the nucleus of an aluminum atom and there are 13 electrons present in an aluminum atom.
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