Question

The ____ identifies an element

Answer 1

Atomic Number. I hope that's what you were asking.

Answer 2

The atomic number identifies an element

Step-by-step explanation:

The atomic number of an element refers to the number of protons in each atom of the element. While the number of neutrons and electrons can vary, changing the masic number as a consequence, the number of protons in an element never changes and because of that it accurately defines it.