1. Find Titanium's Atomic Number:
Titanium (Ti) has an atomic number of 22. This means it has 22 protons and 22 electrons.
2. Identify the Preceding Noble Gas:
The noble gas that comes before titanium on the periodic table is Argon (Ar), which has an atomic number of 18.
3. Write the Noble Gas Core:
The noble gas core for titanium is [Ar]. This represents the 18 electrons that are filled in the same way as argon.
4. Fill the Remaining Orbitals:
Titanium has 4 more electrons to account for (22 total electrons - 18 electrons from Argon = 4). These electrons go into the 4s and 3d orbitals:
* 4s²: The 4s orbital is filled first with 2 electrons.
* 3d²: The remaining 2 electrons go into the 3d orbital.
Therefore, the noble gas configuration of titanium is:
[Ar] 4s² 3d²
