Alkali Metal (Noun)
Meaning
Any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium); "the hydroxides of the alkali metals are strongly alkaline".
Classification
Nouns denoting substances.
Examples
- The reaction of an alkali metal with a halogen produces a salt and usually releases a gas.
- Lithium is the lightest of all the alkali metals and the least reactive.
- Sodium is the sixth most abundant element on Earth, and the second most abundant alkali metal.
- Potassium chloride is an ionic compound that consists of the alkali metal potassium and the halogen chlorine.
- Cesium is a very soft, silvery-gold alkali metal with a melting point of just 23 degrees Celsius.