Multiple Choice
Which of the following elements is a halogen (Group 17) on the periodic table?
2
views
4. Atoms and Elements
Periodic Table: Group Names
Struggling with Introduction to Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which element is most reactive (most active) in Group 17 (the halogens) under standard conditions?
A
Chlorine (Cl)
B
Bromine (Br)
C
Iodine (I)
D
Fluorine (F)
Verified step by step guidance1
Understand that Group 17 elements are called halogens and include Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).
Recall that reactivity in halogens generally decreases as you move down the group in the periodic table because atomic size increases and the ability to attract electrons decreases.
Recognize that Fluorine (F) is at the top of Group 17, meaning it has the smallest atomic radius and the highest electronegativity among the halogens.
Use the concept that higher electronegativity and smaller atomic radius lead to stronger attraction for electrons, making Fluorine the most reactive halogen under standard conditions.
Conclude that among the given options (Chlorine, Bromine, Iodine), Fluorine is the most reactive element in Group 17.
5:33mWatch next
Master Periodic Table: Group Names with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Periodic Table: Group Names practice set
Problem sets built by lead tutorsExpert video explanations