Question

What is diagonal relationship ?​

Answer 1

The elements of the second period which are diagonal to the elements of the third period are called diagonal elements.

For example Li,Be,B,C are diagonal to Mg,Al,Si respectively.

Li ( first member of alkali metals) is similar to Mg ( the second member of group 2)

Answer 2

Answer:

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs exhibit similar properties; for example, boron and silicon are both semiconductors, forming halides that are hydrolysed in water and have acidic oxides.