the electron configuration for magnesium is shown below. 1s²2s²2p⁶3s² which diagram shows the correct…

Explanation:

Step1: Analyze electron - shell capacity

The first shell (1s) can hold 2 electrons, the second shell (2s and 2p combined) can hold 2 + 6=8 electrons, and the third shell (3s) has 2 electrons for magnesium with electron - configuration $1s^{2}2s^{2}2p^{6}3s^{2}$.

Step2: Evaluate the diagram

We need a diagram with 2 electrons in the first shell, 8 electrons in the second shell, and 2 electrons in the third shell.

Answer:

Since the provided diagram is incomplete (only shows some electrons in shells without full details), we assume we are looking for a diagram with 2 electrons in the innermost shell, 8 in the second shell, and 2 in the third shell. Without seeing all the options, we can't pick a specific one from the given single - diagram view, but the correct diagram should have 2 electrons in the first shell, 8 in the second shell, and 2 in the third shell.