How does the Pauli Exclusion principle explain ionization E?

[fangrz]

How does the Pauli-exclusion principle explain ionization energy trends? Is it just that as you move down the periodic table, the electrons experience repulsion between each other, and thus the atoms get bigger?

 

[blue_leaf77]

How does the Pauli-exclusion principle explain ionization energy trends?

Pauli principle alone cannot explain the ionization energy trend, there are also nuclear charge and subshell wavefunction which contribute more to this trend.

 

[alw34]

Does the first chart & explanation here answer your question?

https://en.wikipedia.org/wiki/Ionization_energy

Or try further down that same page..."Quantum Mechanical Explanation".