Multiple Choice
Which of the following elements has chemical 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 generally considered the least reactive?
A
Noble gases (Group 18)
B
Alkali metals (Group 1)
C
Alkaline earth metals (Group 2)
D
Halogens (Group 17)
Verified step by step guidance1
Understand that reactivity in elements is often 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, which they tend to lose easily, making them highly reactive.
Recognize that Group 2 elements (Alkaline earth metals) have two valence electrons and are also quite reactive, though less so than Group 1.
Note that Group 17 elements (Halogens) have seven valence electrons and tend to gain one electron to achieve a full octet, making them very reactive nonmetals.
Identify that Group 18 elements (Noble gases) have a full valence shell, which makes them very stable and generally the least reactive group on the periodic table.
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