Here's a more specific breakdown:
* Above the stair-step: You'll find nonmetals.
* Below the stair-step: You'll find metals.
* Along the stair-step: You'll find metalloids.
The elements generally considered metalloids are:
* Boron (B)
* Silicon (Si)
* Germanium (Ge)
* Arsenic (As)
* Antimony (Sb)
* Tellurium (Te)
* Polonium (Po)
Note: There's some debate about whether some elements like Astatine (At) and Aluminum (Al) should also be considered metalloids.