The element boron has five protons, five electrons and six neutrons. Boron also has an atomic number of five, which indicates how many protons and electrons the atom has. It has a rounded atomic mass of 11 and an atomic symbol of B.
Boron is classified as a metalloid element on the periodic table. Metalloids include boron, silicon, germanium, arsenic, antimony, tellurium and polonium. These elements are a mix of metals and nonmetals and have properties of both groups. Each metalloid has different properties based on whether it is more like metallic elements or more closely resembles the nonmetallic elements.