| 100% | FERMI | 5 | Physicist who conducted the first self-sustaining nuclear chain reaction |
| 45% | FERMI | 5 | Enrico —, Italian nuclear physicist who headed the group that produced the first controlled nuclear reaction |
| 43% | CRITICALMASS | 12 | Sustained nuclear chain reaction requirement |
| 39% | FERMI | 5 | Enrico ___, Italian physicist who is known for creating the world's first nuclear reactor and has an element named after him |
| 37% | LEONA | 5 | Physicist Woods who was the only women on Enrico Fermi's team that built the first nuclear reactor |
| 33% | VOLTA | 5 | Alessandro —, Italian physicist who developed the first electrochemical cell |
| 32% | TOSCA | 5 | Puccini opera ... or the first five letters of the maestro who conducted its La Scala premiere |
| 31% | REACTOR | 7 | Where nuclear chain reactions takes place |
| 30% | SANTAANNA | 9 | Mexican leader who conducted the Alamo siege |
| 30% | LEONARD | 7 | Bernstein who conducted the New York Philharmonic |
| 29% | FERMI | 5 | Physicist who coined the word "neutrino" |
| 29% | KELVIN | 6 | Physicist who calculated the lowest temperature |
| 29% | ALVAREZ | 7 | Physicist who discovered the iridium layer |
| 29% | VOLTA | 5 | Physicist who invented the electric battery |
| 29% | BOHR | 4 | Physicist who worked on the atomic structure |
| 29% | THOMSON | 7 | Physicist who postulated the plum pudding model |
| 28% | FARADAY | 7 | Physicist who formulated the two laws of electrolysis |
| 28% | CHU | 3 | Physicist who co-won the Nobel in 1997 |
| 28% | ALBERTEINSTEIN | 14 | Physicist who developed the theory of relativity: 2 wds. |
| 28% | ORLANDO | 7 | The first name of the actor who played Legolas |
| 28% | ALYN | 4 | Kirk ___, the first actor who played Superman |
| 27% | WHITTAKER | 9 | Jodie __, she plays the first female Doctor Who |
| 27% | REPORTER | 8 | Person who conducts interviews and delivers the news |
| 27% | URBANII | 7 | Pope who started the First Crusade |
| 27% | URBANII | 7 | Pope who initiated the First Crusade |
| 27% | STEINER | 7 | Max who conducted the music for King Kong and Gone With the Wind |
| 27% | PAULDIRAC | 9 | Physicist who received the Nobel Prize and the Max Planck Medal |
| 27% | ALEKSEI | 7 | Cosmonaut Leonov, the first person to conduct a spacewalk |
| 27% | GEIGER | 6 | German physicist who discovered the atomic nucleus |
| 27% | DOLLY | 5 | Sheep who was the first cloned mammal |