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)
26: Iron (Fe)
27: Cobalt (Co)
28: Nickel (Ni)
29: Copper (Cu)
30: Zinc (Zn)

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