1. Elements numbers 1-20

2. Hydrogen
Symbol- H
Gas

3. Helium
Symbol- He
Gas

4. Lithium
Symbol- Li
Solid- metal

5. Beryllium
Symbol- Be
Solid

6. Boron
Symbol- B
Solid

7. Carbon
Symbol- C
Solid

8. Nitrogen
Symbol- N
Gas

9. Oxygen
Symbol- O
Gas

10. Fluorine
Symbol- F
Gas

11. Neon
Symbol- Ne
Gas

12. Sodium Symbol- Na Solid
Symbol from natrium, Latin word for sodium carbonate.
Solid

13. Magnesium
Symbol- Mg
Solid

14. Aluminum
Symbol- Al
Solid

15. Silicon
Symbol- Si
Solid

16. Phosphorus
Symbol- P
Solid

17. Sulfur
Symbol- S
Solid

18. Chlorine
Symbol- Cl
Gas

19. Argon
Symbol- Ar
Gas

20. Potassium
Symbol- K
Name from Kalium, Latin word for alkali
Solid

21. Calcium
Symbol- Ca
Solid