This element’s hydrides are classified as “nido” or “arachno” (10[1])by counting skeletal electron pairs in the Wade–Mingos rules. This element forms the anti-Markovnikov (10[2])product (10[1])when added across a double bond, and is then oxidized with hydrogen (-5[1])peroxide to form alcohols in a reaction named “hydro [this element].” (10[1])The wurtzite form of this element’s nitride is harder than diamond. A canonical (-5[1])Lewis acid is this element’s trifluoride, (10[1]-5[1])which is planar since this element violates the octet rule and only has three valence electrons. (-5[1])For 10 points, what metalloid is located above aluminum on the periodic table and has atomic number five? ■END■ (10[3])