Which of the following pairs of elements exhibit similar physical and chemical behaviors ("diagonal relationships")?
A)H and Be
B)Na and Be
C)Be and Al
D)B and Mg
E)Li and Al

Question

Quizplus · Accepted Answer

Be and Al exhibit diagonal relationships because they are located diagonally across the periodic table. They have similar ionic radii, electronegativity, and similar chemical behavior. H and Be may also exhibit some similarities due to their small size and high electronegativity, but they are not as similar as Be and Al. Na and Be, B and Mg, and Li and Al do not exhibit diagonal relationships.

Which of the Following Pairs of Elements Exhibit Similar Physical