The atom of an element has $9$ protons and $9$ electrons and $10$ neutrons. What is the atomic number of the element?

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Solution

The atomic number is equal to the total number of protons present in the atom of an element.
The given atom of an element has $9$ protons.
It means that its atomic number is $9$ .
Therefore, the atomic number of the given element is $9$ .

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