S-block
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The s-block of the periodic table of elements consists of the first two groups: the alkali metals and alkaline earth metals, plus hydrogen. These elements are distinguished by the property that in the atomic ground state, the highest-energy electron is in an s-orbital. Elements of the s-block are strong reductants.
Related topics
ca:Elements del bloc s es:Elementos del bloque s fr:Éléments du bloc s ja:Sブロック元素 sv:S-blocket