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

In a group of the periodic - table, electronegativity decreases from top to bottom.

Step2: Identify the position of elements

Be, Mg, Ca, and Sr are in the same group (Group 2 - alkaline earth metals), and their order from top to bottom is Be, Mg, Ca, Sr.

Step3: Determine the element with least attraction

The element with the lowest electronegativity in the group has the least attraction for an electron. Since Sr is at the bottom of the group among these four elements, it has the lowest electronegativity.

Answer:

Sr