alkaline earth: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “alkaline earth” mean?
Any of a group of six metallic elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
Audio
Pronunciation
Definition
Meaning and Definition
Any of a group of six metallic elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
The term can refer to the elements themselves or their oxides and hydroxides, which are alkaline (basic) in nature, and historically were distinguished from "alkalis" (Group 1 elements) because their oxides were non-soluble in water.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Pronunciation may vary slightly.
Connotations
Identical scientific connotations.
Frequency
Equally low frequency outside scientific contexts in both varieties.
Grammar
How to Use “alkaline earth” in a Sentence
noun + noun (e.g., alkaline earth metal)adjective + noun (e.g., common alkaline earth)Vocabulary
Collocations
Examples
Examples of “alkaline earth” in a Sentence
adjective
British English
- The alkaline earth properties were clearly demonstrated.
- They studied the alkaline earth compound's reactivity.
American English
- The alkaline earth characteristics were measured.
- An alkaline earth oxide layer formed.
Usage
Meaning in Context
Business
Extremely rare; might appear in contexts related to mining, battery manufacturing, or pharmaceutical industries.
Academic
Standard term in chemistry, geology, materials science, and environmental science textbooks and research.
Everyday
Virtually never used in casual conversation.
Technical
The primary context of use. Precise and necessary in chemical analysis, periodic table discussions, and industrial chemistry.
Vocabulary
Synonyms of “alkaline earth”
Strong
Neutral
Weak
Vocabulary
Antonyms of “alkaline earth”
Watch out
Common Mistakes When Using “alkaline earth”
- Using 'alkaline earth' as a countable noun without 'metal' or 'element' (e.g., 'Calcium is an alkaline earth' is less precise than '...an alkaline earth metal').
- Confusing alkaline earth metals with transition metals.
- Misspelling as 'alkaline earths' (plural form is acceptable but 'alkaline earth metals' is more precise).
FAQ
Frequently Asked Questions
Historically, their oxides were called 'earths' because they were insoluble in water and resistant to heat. These oxides were found to be alkaline (basic) when mixed with water, hence 'alkaline earths'.
Calcium is the most abundant, forming key components of bones, shells, and limestone.
Only radium is naturally radioactive. The others (beryllium, magnesium, calcium, strontium, barium) have stable isotopes.
Alkaline earth metals (Group 2) are harder, denser, have higher melting points, and are less reactive than alkali metals (Group 1). They form +2 ions instead of +1 ions.
Any of a group of six metallic elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
Alkaline earth is usually technical/scientific in register.
Alkaline earth: in British English it is pronounced /ˌæl.kə.laɪn ˈɜːθ/, and in American English it is pronounced /ˌæl.kə.laɪn ˈɝːθ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “none”
Learning
Memory Aids
Mnemonic
Remember the group: Be (Beryllium) Mean (Magnesium) Cats (Calcium) Strangle (Strontium) Bad (Barium) Rodents (Radium). They are 'earth' elements that form 'alkaline' solutions.
Conceptual Metaphor
EARTH AS A BASIC COMPONENT. The historical term 'earth' refers to an insoluble oxide, metaphorically linking these common elements to the solid, foundational material of the planet.
Practice
Quiz
Which of the following is NOT an alkaline earth metal?