Multiple Choice
Which group on the periodic table contains the most reactive metals?
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4. Atoms and Elements
Periodic Table: Group Names
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Which family (group) on the periodic table is generally the least reactive under normal conditions?
A
Halogens (Group 17)
B
Alkaline earth metals (Group 2)
C
Alkali metals (Group 1)
D
Noble gases (Group 18)
Verified step by step guidance1
Understand that reactivity in the periodic table depends on how easily an element gains, loses, or shares electrons to achieve a stable electron configuration.
Recall that Group 1 (Alkali metals) are highly reactive because they have one electron in their outer shell that they readily lose.
Recognize that Group 2 (Alkaline earth metals) are also reactive, though less so than alkali metals, because they have two electrons in their outer shell.
Know that Group 17 (Halogens) are very reactive nonmetals because they need only one electron to complete their outer shell.
Identify that Group 18 (Noble gases) have a full outer electron shell, making them very stable and generally the least reactive under normal conditions.
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