Share this entry

Share this page

alkaline earth

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

Definition of alkaline earth in English:

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.
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:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day tenebrous
Pronunciation: ˈtenəbrəs
adjective
dark; shadowy or obscure