Among the chalcogens, the element that forms an amphoteric dioxide is:
Sulphur
Selenium
Tellurium
Polonium
Among Boron family, the element that forms an amphoteric oxide and amphoteric hydroxide is:
Among the chalcogens, the element that exhibits the highest tendency for catenation is:
Which among the following elements shown in the table forms amphoteric oxide?
Name an element from group 2 Which forms an amphoteric oxide and a water soluble