As a subject matter expert in chemistry, I can provide you with the correct representation of the electron configuration for magnesium (Mg). The electron configuration is a description of the arrangement of electrons around the nucleus of an atom. For magnesium, which has an atomic number of 12, the electron configuration can be represented in two ways: the noble gas notation and the orbital box notation.

English Answer:
The electron configuration of magnesium is represented as [Noble Gas] [nSx] y, where [Noble Gas] refers to the electron configuration of the noble gas from the previous period. For magnesium, this is [Ne], which stands for neon, the noble gas before magnesium in the periodic table. The next part of the configuration is [3S2], indicating that there are two electrons in the 3s orbital. So, the full electron configuration for magnesium is [Ne] 3S2.

In the orbital box notation, also known as the electron dot diagram, magnesium would be represented with two dots in the 3s orbital, as follows:

```
Mg
.
S
**
```

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Note: Magnesium is in Group 2 (sometimes called Group II or 2A). Since it is in Group 2 it will have 2 valence electrons. When you draw the Lewis structure for Magnesium you'll put two "dots" or valance electrons around the element symbol (Mg).read more >>