Whose work linked the reactivity of alkali metals to one outer electron?
Quick Answer
Gilbert N. Lewis’s and later quantum theory’s. The Group 1 metals all have one valence electron, which drives their chemistry.
The Full Story
The striking similarity among lithium, sodium, potassium, rubidium, cesium, and francium comes from their electron configuration: each has one electron in its outermost shell. That single electron is easily lost, making the alkali metals highly reactive and chemically alike. The periodic table’s groupings reflect this shared valence pattern. Modern quantum theory explains the pattern more completely, but the chemical regularity was recognized early through periodic classification.
Key Facts
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"Why the metals in one column act like chemical twins"
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