Multiple Choice
Which element would have properties most similar to sulfur?
2. Atoms & Elements
Periodic Table: Group Names
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Which group of elements on the periodic table is the least reactive?
A
Alkaline earth metals (Group 2)
B
Halogens (Group 17)
C
Noble gases (Group 18)
D
Alkali metals (Group 1)
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 alkaline earth metals (Group 2) are also reactive, though less so than alkali metals, as they have two electrons in their outer shell.
Know that halogens (Group 17) are very reactive nonmetals because they need only one electron to complete their outer shell, making them eager to gain an electron.
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.
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