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Which of these groups of elements shows the least electronegativity?

A. inner-transition elements
B. halogens (7A)
C. alkali metals (1A)
D. transition elements
E. alkaline earth metals (2A)

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Final answer:

Alkali metals in Group 1 display the least electronegativity in elements.


Explanation:

The group of elements showing the least electronegativity is alkali metals (1A). Alkali metals have the lowest electronegativities on the Pauling scale, ranging from approximately 0.7 to 1.0. These metals are found in Group 1 of the periodic table and are highly reactive due to their strong tendency to lose their single valence electron.


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