what was the first 20 element of chemistry
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Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminium
silicon
Phosphorus
Sulphur
Chlorine
Argon
Potassium
Calcium
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Answer:
1. Hydrogen
2.Helium
3.lithium
4. Beryllium
5. Boron
6. Carbon
7. Nitrogen
8. Oxygen
9. Fluorine
10. Neon
11. Sodium
12. Magnesium
13. Aluminium
14. Silicon
15. Phosphorus
16. Sulphur
17. Chlorine
18. Argon
19. Potassium
20. Calcium
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