One of the mysteries of the English language finally explained.
Any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.
- ‘We've used such smart polymers to fabricate chemically sensitive holograms responsive to water, alcohol, pH, and positively charged ions of alkali metal.’
- ‘The first family on the periodic table is the alkali metals.’
- ‘You need an alkali metal, which has one electron in the outer shell, to make the process work.’
- ‘Sodium is an alkali metal and tends to lose an electron to form the positive sodium ion (Na +).’
- ‘He isolated potassium, another well known alkali metal, from potassium hydroxide in the same year.’
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