Question

1. which of these statements is an accurate description of the ionization energies of elements in the periodic table? the ionization energy of lithium is greater than potassium the ionization energy of iodine is greater than fluorine the ionization energy of magnesium is greater than sulfur the ionization energy of krypton is greater than neon

Explanation:

Ionization energy generally decreases down a group and increases across a period. Lithium and potassium are in the same group (Group 1), with lithium above potassium, so lithium has a greater ionization energy as outer - electrons are closer to the nucleus and more tightly held. Iodine is below fluorine in Group 17, so fluorine has higher ionization energy. Magnesium is to the left of sulfur in the third period, so sulfur has higher ionization energy. Krypton is below neon in Group 18, so neon has higher ionization energy.

Answer:

The ionization energy of lithium is greater than potassium.