Question

What is the small group of elements called that include C, N, O?

Answer 1

Answer:

Metalloids are also called "semimetals" or "poor metals." Nonmetals: Everything else to the upper right of the staircase — plus hydrogen (H), stranded way back in Group 1 — is a nonmetal. These include carbon (C), nitrogen (N), phosphorus (P), oxygen (O), sulfur (S) and selenium (Se).