click below
click below
Normal Size Small Size show me how
first 20 elements
| Question | Answer |
|---|---|
| Hydrogen | 1 |
| Helium | 2 |
| Lithium | 3 |
| Berylium | 4 |
| Boron | 5 |
| Carbon | 6 |
| Nitrogen | 7 |
| Oxygen | 8 |
| Flourine | 9 |
| Neon | 10 |
| Sodium | 11 |
| Magnesium | 12 |
| Aluminum | 13 |
| Silicon | 14 |
| Phosphorus | 15 |
| Sulfur | 16 |
| Chlorine | 17 |
| Argon | 18 |
| Potassium | 19 |
| Calcium | 20 |