For 10 points, name this element with atomic weight 10.81 and atomic number 5.
In plants, it serves as a micronutrient, influences calcium ion utilization, and allows root tips to elongate. This element's ability to absorb neutrons led it to be used in the control rods of nuclear reactors. Involved in a common anti-Markovnikov reaction, this element is commonly found in banana bonds and is a notable exception to the octet rule. Together with its silicate, it is found in Pyrex glassware. The lighest element with a 2p electron, it is located above aluminum on the period table. For 10 points, name this element with atomic weight 10.81 and atomic number 5.
In plants, it serves as a micronutrient, influences calcium ion utilization, and allows root tips to elongate.
boron