How many non-metals?

There are seven main non-metals: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium The metalloids are located on the 'staircase' between the metallic elements and the gases Other elements can be classified as non-metal, since the term is very broad. These can included Oxygen, Carbon, the Halogens, the Noble Gases, Hydrogen, etc.

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