A substance’s ability to undergo this process is roughly proportional to “Z-squared over A.” The reproduction factor and resonance escape probability appear in Fermi’s four-factor formula (10[2])describing (10[1])this process. (10[1]-5[2])This process is analogized to a water droplet splitting down the middle (10[3]-5[1])in the liquid (10[2])drop (10[1])model. (10[4]-5[3])Lise (10[1])Meitner (10[3]-5[1])(“LEE-zuh MIGHT-ner”), who co-discovered (10[3])this process, (10[6])was (10[1])snubbed (10[1])from the (10[1]-5[1])Nobel (10[2])Prize (10[2])awarded to Otto Hahn. (10[4]-5[3])Graphite control rods (10[2])moderate (10[8])this (10[1])process (10[10])by (10[1])emitting (10[3])neutrons. (10[10]-5[1])A chain (10[2])reaction (10[3])of this process (10[4])occurs (-5[1])at the critical (10[1])mass (10[2])for (10[1])uranium-235. (10[4]-5[2])For 10 points, (10[2])name (-5[1])this process in which a heavy nucleus splits (10[1])into smaller (10[3])ones, (10[4])contrasted (10[2])with fusion. (10[1])■END■ (10[7])