Question 6.1: IONIZATION ENERGIES Arrange the elements Se, Cl, and S in or...

IONIZATION ENERGIES

Arrange the elements Se, Cl, and S in order of increasing ionization energy.

STRATEGY
Ionization energy generally increases from left to right across a row of the periodic table and decreases from top to bottom down a group. Chlorine should have a larger $E_{i}$ than its neighbor sulfur, and selenium should have a smaller $E_{i}$ than sulfur.

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