alkali metal

noun

Chemistry.

1. any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis.

alkali metal

noun

1. any of the monovalent metals lithium, sodium, potassium, rubidium, caesium, and francium, belonging to group 1A of the periodic table. They are all very reactive and electropositive

alkali metal

1. Any of a group of soft metallic elements that form alkali solutions when they combine with water. They include lithium, sodium, potassium, rubidium, cesium, and francium. Except for cesium, which has a gold sheen, alkali metals are white. The alkali metals have one electron in their outer shell, and therefore react easily with other elements and are found in nature only in compounds.

2. See Periodic Table

Word History and Origins

Origin of alkali metal¹

First recorded in 1880–85

Example Sentences

Using the proposed method, larger alkali metal ions such as cesium could be incorporated into the perovskite structure, leading to ferroelectrics with desirable dielectric properties.

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Characterized by its vast mirror-like surfaces and dry atmosphere, the flat hides beneath it a precious alkali metal that powers much of the modern world.

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Initial calculations indicated that they could contain more than 280,000 tonnes of lithium, a silver-white alkali metal – enough for 10 years’ production.

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One is that no photoredox catalyst provides a reductant comparable in strength to that of alkali metals such as lithium and sodium.

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Close observers of nature noted that certain chemical elements like lithium, sodium and potassium — known today as alkali metals — were all soft and floated in water.

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