Question

write the ground - state electron configuration for the following ion, which plays an important role in biochemical processes in our bodies. mg²⁺:

Explanation:

Step1: Determine Mg's atomic number

Magnesium (Mg) has an atomic number of 12, so neutral Mg has 12 electrons.

Step2: Consider the ion charge

$Mg^{2 + }$ has lost 2 electrons. So it has 12 - 2=10 electrons.

Step3: Write the electron - configuration

Using the Aufbau principle, the electron - configuration of an atom/ion with 10 electrons is $1s^{2}2s^{2}2p^{6}$.

Answer:

$1s^{2}2s^{2}2p^{6}$