Question

what element forms an ion with an electronic configuration of ne and a -2 charge? element symbol:

Explanation:

Step1: Determine the number of electrons in the ion

The electron configuration of \([Ne]\) means the ion has 10 electrons.

Step2: Relate the charge to the number of protons

Since the ion has a \(- 2\) charge (\(X^{2 -}\)), the number of protons \(Z\) (atomic number) can be found using the formula \(Z=\text{number of electrons}-\text{charge}\). So \(Z = 10-(-2)=8\).

Answer:

\(O\)