# What is Diagonal Relationship-Definition, Example, Question

Hi, today we will learn about Diagonal Relationship-Definition, Example, Question in this article. It is one of the important topics in chemistry where you need to understand the concept.

## What is Diagonal Relationship?

some elements of the second period of the periodic table show diagonal similarity with the elements of the third period. this relation is called diagonal relationship.

### Diagonal Relationship in Periodic Table

Period | Group 1 | Group 2 | Group 13 | Group 14 |

2 | Li | Be | B | C |

3 | Na | Mg | Al | Si |

In the periodic table, the similarity of the two elements is observed diagonally. See the periodic table as given above.

Among the lighter members of the second and third-period components, the diagonal relationship is prominent. Thus, Li (Lithium) of Group IA shows the diagonal – the relationship with Mg (Magnesium) of Group IIA, Be (Beryllium) of Group IIA shows the diagonal – the relationship with Al (Aluminium) of Group IIIA, and B (Boron) of Group IIIA shows the diagonal – the relationship with Si (Silicon) of Group IIA.