Diagonal Relationships

[ZoeHahn1J]

How common are diagonal relationships between elements in the periodic table? The textbook gives a few examples (metalloids, Li/Mg, Be/Al), but are there many more? Do most elements share chemical properties with the elements diagonal to them, or just certain ones? Do we only see diagonal relationships in main group elements?

[Hena Sihota 1L]

The textbook defines diagonal relationships as "a similarity in properties between diagonal neighbors in the main groups of the periodic table," so yes we only see diagonal relationships in main group elements.