# What is the first ionization energy of an element that has the electron configuration 2-8?

And protons are the fundamental, massive, positively-charged particles that live in the nuclear core. And the number of protons gives $Z$, $\text{the atomic number}$, the which defines the identity of the nucleus. And so you looks at your Periodic Table, beside you now, and you tell us what $Z = 10$ represents.... it starts with a $\text{n}$...
${\underbrace{M \left(g\right) + \Delta \rightarrow {M}^{+} \left(g\right) + {e}^{-}}}_{\text{this represents the first ionization of the element}}$