Which element has the electron configuration [Ar] 4s23d104p2?AGermaniumBGalliumCSiliconDIndium

The element with the electron configuration [Ar] 4s2 3d10 4p2 is Germanium (Ge). Here's how you can determine this:

1. The electron configuration [Ar] 4s2 3d10 4p2 means that the element is in the 4th period of the periodic table.

2. The [Ar] at the beginning of the configuration stands for Argon, which has an atomic number of 18. This means that the first 18 electrons are accounted for.

3. The 4s2 means that the next 2 electrons are in the 4s orbital.

4. The 3d10 means that the next 10 electrons are in the 3d orbital.

5. The 4p2 means that the next 2 electrons are in the 4p orbital.

6. If you add up all these electrons (18 from Argon, 2 from the 4s orbital, 10 from the 3d orbital, and 2 from the 4p orbital), you get a total of 32 electrons.

7. The element with an atomic number (which is equal to the number of electrons in a neutral atom) of 32 is Germanium (Ge).

So, the answer is A. Germanium.