Elements
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Chemical element Chemical series Electron configuration 11 Na Sodium Alkali metal 3s1 12 Mg Magnesium Alkaline earth metal 3s2 13 Al Aluminium Post-transition metal 3s2 3p1 14 Si Silicon Metalloid 3s2 3p2 15 P Phosphorus Nonmetal 3s2 3p3 16 S Sulfur Nonmetal 3s2 3p4 17 Cl Chlorine Halogen 3s2 3p5 18 Ar Argon Noble gas 3s2 3p6
Read more about this topic: Period 3 Element
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—Anonymous, U.S. women’s magazine contributor. The Revolution (August 19, 1869)
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—Antoinette Brown Blackwell (1825–1921)