Periodic table.
The modern periodic table contains 118 elements , which are commonly grouped into 91–93 metals, 17–20 nonmetals, and 6–7 metalloids depending on the specific te
The modern periodic table contains 118 elements , which are commonly grouped into 91–93 metals, 17–20 nonmetals, and 6–7 metalloids depending on the specific textbook classification. Standard 7 metalloids : Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Polonium (Po) or Astatine (At) in some variations.