Question

what is the atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons? 9 10 19 28

Explanation:

The atomic number of an element is defined as the number of protons in its nucleus. In this case, the element has 9 protons. The number of electrons (which is equal to the number of protons in a neutral atom) and neutrons are not relevant for determining the atomic number.

Answer:

9