This is the lightest element to have an electron in the p-shell, and it can violate the octet rule, with an incomplete octet of only six electrons around it.
A hydride of this element can be produced when reacting with peroxides in the Brown reaction, and halides react with this element's acid in Suzuki coupling. The mineral form of this element's acid is sassolite, and the bonding of this element to hydrogen is specified by Wade's rules. The hydride of this element has banana bonds, and this element can be isolated from ulexite and borax. This is the lightest element to have an electron in the p-shell, and it can violate the octet rule, with an incomplete octet of only six electrons around it. For 10 points, name this element discovered by Humphry Davy, with atomic number 5 and symbol B.
A hydride of this element can be produced when reacting with peroxides in the Brown reaction, and halides react with this element's acid in Suzuki coupling.
Boron