Across
- 4. Symbol: Cl and it is a yellow gas at room temperature
- 5. US five cent coin is 75% copper and 25% nickel
- 6. Atomic number is at 10 and it is found in digital devices
- 7. Its symbol is Na and it is highly reactive
- 9. It makes up 1.28% of Earth's atmosphere
Down
- 1. Symbol: C and it is non-metallic
- 2. Its symbol is "Cu"
- 3. Atomic number is 22
- 4. Has 20 protons, neutrons and electrons
- 8. We breath it in and out everyday of our lives