Template:Periodic table (period 3)
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Period 3 in the periodic table
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |
| Group → | ||||||||||||||||||
| ↓ Period | ||||||||||||||||||
| 3 | Sodium11Na22.990 | Magnesium12Mg24.305 | Aluminium13Al26.982 | Silicon14Si28.085 | Phosphorus15P30.974 | Sulfur16S32.06 | Chlorine17Cl35.45 | Argon18Ar39.95 | ||||||||||
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Primordial From decay Synthetic Border shows natural occurrence of the element | ||||||||||||||||||