Question

Which of the following pair exhibits diagonal relationship?

• A. Li and Mg
• B. Li and Na
• C. Mg and Al
• D. B and P
• E. C and Cl

Hint:

Diagonal relationships in the periodic table refer to similar properties between elements that are diagonally placed.

Answer 1

The Correct Option is A

Step 1: A diagonal relationship refers to the similar properties of elements that are diagonally placed in the periodic table. Li and Mg are a classic example of this. 
Step 2: Both Li and Mg have similar atomic sizes, ionization energies, and electropositive behavior despite being in different groups (Li in Group 1 and Mg in Group 2). 
Step 3: Thus, Li and Mg exhibit diagonal relationship.