1. Find the atomic number of Pr:
Praseodymium has an atomic number of 59. This means it has 59 protons and 59 electrons.
2. Find the nearest noble gas with a lower atomic number:
The nearest noble gas with a lower atomic number than 59 is Xenon (Xe), which has an atomic number of 54.
3. Write the noble gas symbol in brackets:
[Xe]
4. Determine the remaining electron configuration:
* Xenon has 54 electrons. Pr has 59 electrons, so we need to add the remaining 5 electrons.
* The electron configuration for Pr is [Xe] 4f³ 6s².
Therefore, the noble gas electron configuration for Pr is [Xe] 4f³ 6s²
