Trends in EN and IE

[Aj1156]

Why is it that ionization energy increases from left to right? I know it has something to do with more attraction pulling the electrons toward the interior, but I would like a more thorough understanding.

Why does EN energy increase from left to right?

[Leela_Mohan3L]

Ionization energy increases from left to right because the amount of protons is increasing, and thus the nuclear charge increases. As a result, the electrons are more attracted to the nucleus, which makes them more difficult to remove. Electronegativity increases from left to right for the same reason. More protons --> greater nuclear charge --> stronger attraction of electrons to the nucleus.