Select all the statements that correctly describe periodic trends in ionization energies (IE).
- Going down a group, valence electrons are increasingly shielded from the nucleus by core electrons and are easier to remove (IE decreases).
- Across a row, valence electrons are more attracted to the nucleus because of the increased number of protons (IE increases).
- Going down a group, valence electrons are farther from the nucleus and are easier to remove (IE decreases).
- Going down a group, valance electrons are more attracted to the nucleus and are easier to remove (IE decreases).
- Across a row, the increasing nuclear charge pushes the electrons in the valence level farther from the nucleus (IE increases).