Its white allotropes has a tetrahedral structural unit, and the red kind forms a network of those tetrahedrons chained together.
A reagent with this element makes alkenes (AL-keenz) from carbonyl (CAR-bo-NEEL) compounds in the Wittig (VIT-tig) reaction. Its black form has a structure like graphite. Its white allotropes has a tetrahedral structural unit, and the red kind forms a network of those tetrahedrons chained together. For 10 points, name this element, whose oxide is found in the backbone of DNA, and which is located immediately below nitrogen on the Periodic Table.
A reagent with this element makes alkenes (AL-keenz) from carbonyl (CAR-bo-NEEL) compounds in the Wittig (VIT-tig) reaction.
{phosphorus} [or {P}]