Multiple Choice
Which of the following elements is a member of the halogen family?
3
views
2. Atoms & Elements
Periodic Table: Group Names
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which group on the periodic table is considered the least reactive?
A
Alkali metals (Group 1)
B
Noble gases (Group 18)
C
Halogens (Group 17)
D
Alkaline earth metals (Group 2)
Verified step by step guidance1
Understand that reactivity in the periodic table varies by group and is influenced by the electron configuration of the elements.
Recall that Alkali metals (Group 1) are highly reactive because they have one electron in their outer shell that they readily lose to form positive ions.
Recognize that Halogens (Group 17) are also very reactive because they have seven electrons in their outer shell and tend to gain one electron to achieve a full octet.
Note that Alkaline earth metals (Group 2) are reactive, though less so than alkali metals, because they have two electrons in their outer shell that they can lose.
Identify that Noble gases (Group 18) are the least reactive group because they have a full outer electron shell, making them very stable and unlikely to react under normal conditions.
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