Multiple Choice
Which group of the periodic table does fluorine belong to?
2. Atoms & Elements
Periodic Table: Group Names
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Which group on the periodic table contains elements that are the least reactive?
A
Noble gases (Group 18)
B
Halogens (Group 17)
C
Alkaline earth metals (Group 2)
D
Alkali metals (Group 1)
Verified step by step guidance1
Understand that reactivity in elements is related to their electron configuration, especially the valence electrons in the outermost shell.
Recall that elements in Group 1 (Alkali metals) have one valence electron, making them highly reactive as they tend to lose that electron easily.
Recognize that Group 2 elements (Alkaline earth metals) have two valence electrons and are also quite reactive, though less so than alkali metals.
Know that Group 17 elements (Halogens) have seven valence electrons and are very reactive because they tend to gain one electron to complete their octet.
Identify that Group 18 elements (Noble gases) have a full valence shell, making them very stable and the least reactive group on the periodic table.
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