PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship Due to digonal relation which pair are amphoteric in nature

PASSAGE - 1: In Mendeleeff's periodic table elements were classified o

1.	PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship Due to digonal relation which pair are amphoteric in nature
Answer» `Li_2,O,MGO` `BEO,MgO` `B_2,O_3Al_2O_3` `BeO,Al_2O_3` ANSWER :D