As a micronutrient, this 
As a micronutrient, this element interacts with calcium in plants and helps maintain their cell walls. In an alloy with neodymium and iron, atoms of this element form the strongest permanent magnets. Found in colemanite and the optically bizarre ore ulexite, this element's [*] hydride contains ‘banana bonds' and is a Lewis acid. Its oxide is found with silica in labware made of Pyrex glass, and this lightest element with electrons in a p-shell usually requires six valence electrons to be stable, violating the octet rule. For 10 points, name this nonmetal element with atomic number 5 and symbol B.
As a micronutrient, this element interacts with calcium in plants and helps maintain their cell walls.
boron 