1. rubidium-strontium dating

noun. Geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years.
Synonyms
geological dating dating
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2. strontium

noun. (ˈstrɑːntiːəm) A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite.
Synonyms
strontianite Sr metal celestite atomic number 38 strontium 90 metallic element
Antonyms
nonmetallic
Etymology
strontium (English)
Strontian (Scots)

3. rubidium

noun. A soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite.
Synonyms
lepidolite metal carnallite atomic number 37 Rb pollucite metallic element
Antonyms
nonmetallic

4. dating

noun. (ˈdeɪtɪŋ) Use of chemical analysis to estimate the age of geological specimens.
Synonyms
rubidium-strontium dating qualitative analysis carbon-14 dating carbon dating geological dating potassium-argon dating radiocarbon dating chemical analysis
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