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- Hydrogen (H) – 1
- Helium (He) – 2
- Lithium (Li) – 3
- Beryllium (Be) – 4
- Boron (B) – 5
- Carbon (C) – 6
- Nitrogen (N) – 7
- Oxygen (O) – 8
- Fluorine (F) – 9
- Neon (Ne) – 10
- Sodium (Na) – 11
- Magnesium (Mg) – 12
- Aluminium (Al) – 13
- Silicon (Si) – 14
- Phosphorus (P) – 15
- Sulfur (S) – 16
- Chlorine (Cl) – 17
- Argon (Ar) – 18
- Potassium (K) – 19
- Calcium (Ca) – 20
- Scandium (Sc) – 21
- Titanium (Ti) – 22
- Vanadium (V) – 23
- Chromium (Cr) – 24
- Manganese (Mn) – 25
- Iron (Fe) – 26
- Cobalt (Co) – 27
- Nickel (Ni) – 28
- Copper (Cu) – 29
- Zinc (Zn) – 30
- Gallium (Ga) – 31
- Germanium (Ge) – 32
- Arsenic (As) – 33
- Selenium (Se) – 34
- Bromine (Br) – 35
- Krypton (Kr) – 36
- Rubidium (Rb) – 37
- Strontium (Sr) – 38
- Yttrium (Y) – 39
- Zirconium (Zr) – 40
- Niobium (Nb) – 41
- Molybdenum (Mo) – 42
- Technetium (Tc) – 43
- Ruthenium (Ru) – 44
- Rhodium (Rh) – 45
- Palladium (Pd) – 46
- Silver (Ag) – 47
- Cadmium (Cd) – 48
- Indium (In) – 49
- Tin (Sn) – 50
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