THE s-BLOCK ELEMENTS
THE s-BLOCK ELEMENTS 301 Property Lithium Sodium Potassium Rubidium Caesium Francium Li Na K Rb Cs Fr Atomic number 3 11 19 37 55 87 Atomic mass (g mol–1) 6.94 22.99 39.10 85.47 132.91 (223) Electronic [He] 2s1 [Ne] 3s1 …
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