Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the atoms of which element will have the least attraction for an electron?

Electronegativity generally decreases down a group because the atoms get larger and their outer electrons are farther from the nucleus. Be, Mg, Ca, and Sr are listed from higher to lower in Group 2, so Sr has the lowest electronegativity and the least attraction for an electron.

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