Multiple Choice
Which halogen element has 5 energy levels in its atoms?
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2. Atoms & Elements
Periodic Table: Group Names
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Which of the following halogens has the highest boiling point?
A
Fluorine (F2)
B
Bromine (Br2)
C
Chlorine (Cl2)
D
Iodine (I2)
Verified step by step guidance1
Step 1: Understand that the boiling point of halogens depends primarily on the strength of intermolecular forces, specifically London dispersion forces, because halogens are nonpolar molecules.
Step 2: Recognize that London dispersion forces increase with the size and molar mass of the molecule, as larger atoms have more electrons and more easily polarizable electron clouds.
Step 3: Compare the molar masses of the halogens given: Fluorine (F2), Chlorine (Cl2), Bromine (Br2), and Iodine (I2), noting that Iodine has the highest molar mass among them.
Step 4: Conclude that because Iodine (I2) has the largest molar mass and strongest London dispersion forces, it will have the highest boiling point among the halogens listed.
Step 5: Remember that this trend is consistent across the halogen group in the periodic table, where boiling points increase down the group due to increasing atomic size and molar mass.
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