Question

Which halogen has the highest ionization energy? Is this what you would predict based on what you have learned about periodic properties?

a. Fluorine - Yes
b. Chlorine - Yes
c. Bromine - Yes
d. Iodine - No

Answer 1

Fluorine has the highest ionization energy among the halogens, which aligns with periodic properties that indicate ionization energy increases across a period.

Step-by-step explanation:

The halogen with the highest ionization energy is fluorine (F). Ionization energy generally increases across a period from left to right and decreases down a group in the periodic table. Since fluorine is the topmost halogen in Group 17 (the halogen group), it has the highest ionization energy of all the halogens.

This aligns with periodic properties since atoms become smaller across a period due to the increased nuclear charge that pulls electrons closer to the nucleus, making them harder to remove. Thus, based on what we know about periodic properties, we would predict that fluorine has the highest ionization energy among the halogens, making option a. Fluorine - Yes, the correct answer.