Amphoteric Compounds and Periodic table

[Jayza Calderon 2A]

I am still a bit unclear on how and why the metalloids on the periodic table are amphoteric?
Can anyone show me quick methods to determine whether something is amphoteric or not?
Thank you.

[Nathan Morgan 2C]

Hello! So in general something is amphoteric if it is able to react both as a base and an acid. So specifically, what I look out for is a negative charge on the compound, along with a hydrogen atom. This more pertains to your second question than your first, but I hope that this is helpful!

[Jayza Calderon 2A]

Yes, this is very helpful. Is that always the rule or are there any exceptions?

[cnyland]

They are amphoteric because they can act as an acid or a base! (Gaining Proton or Giving off a positive charge because they have H from water)

[Romi Moore 3k]

Would this mean all metalloids are amphoteric?