| 100% | CERIUM | 6 | Rare-earth element and soft metal, symbol Ce |
| 51% | TERBIUM | 7 | Metallic rare earth element with symbol Tb |
| 47% | ASTATINE | 8 | Rarest natural element on Earth, symbol At |
| 40% | DYSPROSIUM | 10 | Metallic element of the rare earth group; symbol Dy |
| 36% | SCARCEST | 8 | Like promethium, among all the rare earth metals |
| 36% | THORIUM | 7 | Soft silvery-white element; symbol Th |
| 36% | PRASEODYMIUM | 12 | Soft silvery metallic element; symbol Pr |
| 36% | CERIUM | 6 | Silvery-white metal; symbol Ce |
| 36% | PALLADIUM | 9 | Rare and valuable silvery-white metal |
| 35% | YTTERBIUM | 9 | Soft silvery-white metallic element; symbol Yb |
| 35% | THALLIUM | 8 | Soft silvery-white metallic element; symbol Tl |
| 35% | TERBIUM | 7 | Rare-earth element |
| 35% | YTTRIUM | 7 | Rare-earth element |
| 34% | HOLMIUM | 7 | Soft, reactive metal, used in magnets, symbol Ho |
| 34% | STRONTIUM | 9 | Earth metal used in fireworks, with symbol Sr |
| 34% | MAGNESIUM | 9 | Element with atomic number 12 and symbol Mg |
| 34% | BARIUM | 6 | Element with atomic number 56 and symbol Ba |
| 34% | MAGNESIUM | 9 | Earth metal Mg, used in fireworks and photography |
| 34% | CAESIUM | 7 | Silvery metal chemical element; symbol Cs |
| 34% | LITHIUM | 7 | Soft silver-white metal; symbol Li |
| 34% | POTASSIUM | 9 | Soft silvery-white metal; symbol K |
| 34% | ASTATINE | 8 | Rarest naturally occurring element in the earth's crust |
| 34% | TECHNETIUM | 10 | Radioactive metal; chemical element with symbol Tc |
| 33% | RUBIDIUM | 8 | Reactive, soft alkali metal, symbol Rb |
| 32% | CARBON | 6 | Chemical element with symbol C and atomic number 6 |
| 32% | NITROGEN | 8 | Chemical element with symbol N and atomic number 7 |
| 32% | YTTRIUM | 7 | Rare-earth element whose atomic number is 39 |
| 31% | SCANDIUM | 8 | Rare-earth element named after where it was discovered |
| 30% | TERBIUM | 7 | Rare-earth metal (Tb) named after village Ytterby |
| 30% | ELEMENT | 7 | Any of the rare-earth metals |