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Period 3 elements

Period 3 covers eight elements from sodium to argon. It mirrors period 2 in structure but with a third electron shell, and includes industrially crucial elements like aluminium, silicon, phosphorus and sulfur.

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Category: All elements Nonmetals Noble gases Alkali metals Alkaline earth metals Metalloids Post-transition metals Transition metals Lanthanides Actinides
Period: 1 2 3 4 5 6 7
Group: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Block: S P D F
Phase: Solid Liquid Gas

List of chemical elements (8)

Cards Compact Table List
11 Na Sodium 12 Mg Magnesium 13 Al Aluminium 14 Si Silicon 15 P Phosphorus 16 S Sulfur 17 Cl Chlorine 18 Ar Argon