actinium
n. (Ac) radioactive metallic element (Chemistry) | ||||
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Actinium definition was found in categories: Language, Idioms & Slang(3) Science & Technology(2) Entertainment & Music(1) Encyclopedia(1)
Actinium Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Actinium
(n.)
A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.
(n.)
A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.
| WordNet 2.0 |
actinium
Noun
1. a radioactive element of the actinide series; found in uranium ores
(synonym) Ac, atomic number 89
(hypernym) chemical element, element
(substance-holonym) uranium ore
Noun
1. a radioactive element of the actinide series; found in uranium ores
(synonym) Ac, atomic number 89
(hypernym) chemical element, element
(substance-holonym) uranium ore
| hEnglish - advanced version |
actinium
actinium
\ac*tin"i*um\ (&?;), n. [gr. &?;, &?;, ray.] (chem.) a supposed metal, said by phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.
actinium
\ac*tin"i*um\ (&?;), n. [gr. &?;, &?;, ray.] (chem.) a supposed metal, said by phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.
Actinium Definition from Science & Technology Dictionaries & Glossaries
| Mineralogy Database |
Actinium (Ac)
Atomic Mass : 227
Atomic Number : 89
Name Origins : From the Greek, aktinos = "ray."
Year Discovered : 1899
Discovery Credits : Discovered by A. Debierne at Paris, France.
More Details
Atomic Mass : 227
Atomic Number : 89
Name Origins : From the Greek, aktinos = "ray."
Year Discovered : 1899
Discovery Credits : Discovered by A. Debierne at Paris, France.
More Details
| Chemistry of the Elements |
Actinium
Name: actinium
Symbol: Ac
Atomic number: 89
Atomic weight: [ 227 ]
Group in periodic table:
Group name:
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
CAS registry ID: 7440-34-8
Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times more radioactive than radium.
Name: actinium
Symbol: Ac
Atomic number: 89
Atomic weight: [ 227 ]
Group in periodic table:
Group name:
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
CAS registry ID: 7440-34-8
Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times more radioactive than radium.
Actinium Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Actinium
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Actinium Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Actinium
Actinium (IPA: ) is a chemical element in the periodic table that has the symbol Ac and atomic number 89.
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