| 267 | Element Mash-Up Puzzle: Capital Cities |
| 264 | Elements in DNA, Proteins, and Vitamins 🧬 (Sudden Death) |
| 261 | Most Expensive Substances (by Weight) |
| 236 | The LSD Quiz |
| 233 | Elements - Sudden Death |
| 229 | Elements Plants Need to Grow (Minerals/Nutrients) |
| 227 | Toxic Chemicals - Sudden Death! |
| 224 | Three Real and One Fake - Elements |
| 221 | Elemental Words - Countries Edition #2 |
| 219 | Elements that Beat Iron |
| 218 | Elements that Start with "A" |
| 216 | Scientific Names of Compounds By Atomic Symbol |
| 208 | Vitamin Names 💊 (Click Quiz) |
| 202 | 11 Elements in Latin |
| 201 | Elements With the Most Borders |
| 198 | Natural and Artificial Sweeteners (Food and Nutrition) |
| 195 | Elemental Words - Countries Edition #3 |
| 192 | Elements with the Longest Names |
| 185 | Vitamins: Water-Soluble or Fat-Soluble? |
| 174 | Which is an element? |
| 163 | Hydrocarbons by Picture |
| 157 | Elements & US states that share abbreviations |
| 139 | Chemical Equation Solving Quiz |
| 131 | Name a Valid Element A-Z |
| 130 | The Only Remaining Chemical Element... |
| 129 | Element Namesakes |
| 126 | Nucleobases |
| 122 | Click the Periodic Table |
| 117 | Element Etymologies |
| 111 | US States with the Highest Radon Levels |
| 105 | Structural Formula Identifyer Quiz |
| 105 | 14 chemical elements that are represented by a single letter |
| 103 | Periodic Table of the Elements on a "Map" |
| 95 | Elements that differ from their symbols |
| 94 | Don't Get Whammied by the Chemical Elements |
| 89 | Name That Ionic Compound |
| 89 | Elements with 'irregular' Symbols |
| 86 | Periodic Element to Symbol - Whammies |
| 80 | Top 10 Manganese Producing Countries Quiz |
| 59 | Name That Molecular Compound |
| 56 | Name an Element in Each Group |
| 53 | Element Names That Don't Match Their Symbols |
| 51 | Famous People in the World of Psychedelics |
| 45 | Functional Groups by Chemical Formula |
| 43 | Name That Organic Compound |
| 40 | Rare-Earth Elements - Sudden Death |
| 39 | Citric acid cycle. (Krebs cycle) |
| 38 | Countries Hidden in Chemical Symbols |
| 37 | Chemical Elements Essential for Humans |
| 37 | Elements of the Periodic Table - One Minute Sprint |
| 36 | Element Etymologies |
| 36 | Chemical Symbols that are also ISO Country Codes - Sudden Death |
| 36 | Basic Molecules |
| 35 | Elements with Missing Words |
| 33 | World Capitals Spelled Using Only Elements |
| 32 | Phase Changes |
| 32 | Elements by Year of Discovery |
| 30 | Elements - Backwards! |
| 25 | Halogens Sudden Death - Easy |
| 25 | Shared State–Element Abbreviations |
| 24 | Substance Formulas |
| 24 | Chemical Criminal. |
| 22 | European Country Names Made Entirely Out of Element Symbols |
| 21 | Elements That Are Critical Minerals 🪨 |
| 20 | Capitals Hidden in Chemical Symbols |
| 19 | Elements That Share a Symbol With a U.S. State |
| 19 | The Extended Periodic Table |
| 17 | Halogens Sudden Death - Hard |
| 17 | Periodic Table #5: Elements of Antiquity |
| 15 | Chemical Conveyor |
| 15 | Elements A-Z by clue |
| 14 | Alkanes Sudden death |
| 14 | Plastics by Abbreviations |
| 13 | Elements by Ore |
| 13 | Periodic Table #3: Gods, Myths, and Greek Words |
| 12 | Periodic Table #2: Elements Named After Places |
| 12 | Top Antimony-Producing Countries |
| 12 | Periodic Table #6: Where is it found? |
| 11 | Hydrogen Element Quiz |
| 12 | Periodic Table #1: Elements Named after Scientists |
| 10 | Stable Isotopes sudden death |
| 10 | US State Names Made Entirely Out of Element Symbols |
| 10 | Similar Periodic Table Symbols Quiz |
| 9 | Periodic Table #4: Names from Greek and Latin Roots |
| 9 | Elements of the Periodic Table - Groups |
| 8 | Hide and Seek - Elements #2 |
| 8 | Hide and Seek - Elements |
| 8 | Identify the functional groups by the molecule |
| 8 | Phase Diagram |
| 6 | Hilariously Bad Descriptions of Science Terms |
| 6 | Helium Element Quiz |
| 6 | Hide and Seek - Elements #3 |
| 3 | Elements With Near-Perfect Atomic Weight |
| 2 | Diatomic elements by Bond order |
