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Periodic table
| Term | Definition |
|---|---|
| Carbon | C |
| Nitrogen | N |
| Oxygen | O |
| Sodium | Na |
| Magnesium | Mg |
| Aluminum | Al |
| Sulfur | S |
| Potassium | K |
| Calcium | Ca |
| Iron | Fe |
| Nickel | Ni |
| Zinc | Zn |
| Silver | Ag |
| Gold | Au |
| Vertical columns on the periodic table | Groups |
| Who organized the periodic table | Dmitri Mendeleev |
| Helium | He |
| Hydrogen | H |
| Neon | Ne |
| Chlorine | Cl |
| Copper | Cu |
| Lead | Pb |
| Horizontal rows on the periodic table | Periods |
| The atomic number on the periodic table represents | protons |
| Number of elements on the periodic table | 118 |