Definition of alkaline earth in English:

alkaline earth

Line breaks: al¦ka|line earth
(also alkaline earth metal)

noun

Any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table. They are reactive, electropositive, divalent metals, and form basic oxides which react with water to form comparatively insoluble hydroxides.
More example sentences
  • Barium is the fifth element in Group 2 of the periodic table, the alkaline earth elements.
  • Family 2 on the periodic table is the alkaline earth metals with two valence electrons.
  • Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases.

Definition of alkaline earth in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day inamorata
Pronunciation: inˌaməˈrätə
noun
a person's female lover