Question

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?
be
mg
ca
sr

Explanation:

Step1: Recall electronegativity trend

Electronegativity decreases down a group.

Step2: Identify position in group

Be, Mg, Ca, Sr are in Group 2. Sr is the bottom - most element among them.

Step3: Determine element with least attraction

Since electronegativity decreases down the group, Sr has the lowest electronegativity and thus the least attraction for an electron.

Answer:

Sr