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