Question

Diagonal relationship is shown by

• A. All elements with their diagonally opposite elements.
• B. All elements of $3^{rd}$ and $4^{th}$ periods
• C. Some of the elements of $2^{nd}$ and $3^{rd}$ periods
• D. Elements of d-block

Answer 1

The correct option is C Some of the elements of $2^{nd}$ and $3^{rd}$ periods

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third period of the periodic table. These pairs (lithium (Li) and magnesium (Mg), beryllium (Be) and aluminium (Al), boron (B) and silicon (Si) etc.)