Level 2
Level 1

#1-25


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1. Hydrogen
H
2. Helium
He
3. Lithium
Li
4. Beryllium
Be
5. Boron
B
6. Carbon
C
7. Nitrogen
N
8. Oxygen
O
9. Fluorine
F
10. Neon
Ne
11. Sodium
Na
12. Magnesium
Mg
13. Aluminum
Al
14. Silicon
Si
15. Phosphorus
P
16. Sulfur
S
17. Chlorine
Cl
18. Argon
Ar
19. Potassium
K
20. Calcium
Ca
21. Scandium
Sc
22. Titanium
Ti
23. Vanadium
V
24. Chromium
Cr
25. Manganese
Mn