Is boron considered a metal or nonmetal?

A picture is worth a thousand words. Blue is metal, Yellow is non-metal and red is semi. White is proposed elements not determined yet. The black stepping line shows the border between metals and others. read more

Boron is a non metal, but it is considered a metalloid. Metalloids are chemical elements which have properties in between those of metals and nonmetals, or that have a mixture of them. There is neither a standard definition of a metalloid nor complete agreement on the elements appropriately classified as such. read more

Crystal boron is a dark substance with a hardness rivaling that of diamond. As a metalloid, boron's physical and chemical properties are between those of metals and nonmetals. It behaves as a nonmetal in reaction with sodium and a metal when combined with fluorine. read more