tantalum
n. (Ta) hard gray metallic element (Chemistry) | ||||
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Tantalum Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Tantalum
(n.)
A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
(n.)
A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
| WordNet 2.0 |
tantalum
Noun
1. a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite
(synonym) Ta, atomic number 73
(hypernym) metallic element, metal
(substance-holonym) fergusonite
Noun
1. a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite
(synonym) Ta, atomic number 73
(hypernym) metallic element, metal
(substance-holonym) fergusonite
| hEnglish - advanced version |
tantalum
tantalum
\tan"ta*lum\ (?), n. [nl. so named on account of the perplexity and difficulty encounterd by its discoverer (ekeberg) in isolating it. see tantalus.] (chem.) a rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. symbol ta. atomic weight 182.0. formerly called also tantalium.
tantalum
n : a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite [syn: ta, atomic number 73]
tantalum
symbol: ta atomic number: 73 atomic weight: 180.948 heavy blue-grey metallic transition element. ta-181 is a stable isotope, and ta-180 is a radioactive isotope, with a half-life in excess of 10^7 years. used in surgery as it is unreactive. forms a passive oxide layer in air. identified in 1802 by ekeberg and isolated in 1820 by jons j. berzelius.
-- elements
tantalum
\tan"ta*lum\ (?), n. [nl. so named on account of the perplexity and difficulty encounterd by its discoverer (ekeberg) in isolating it. see tantalus.] (chem.) a rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. symbol ta. atomic weight 182.0. formerly called also tantalium.
tantalum
n : a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite [syn: ta, atomic number 73]
tantalum
symbol: ta atomic number: 73 atomic weight: 180.948 heavy blue-grey metallic transition element. ta-181 is a stable isotope, and ta-180 is a radioactive isotope, with a half-life in excess of 10^7 years. used in surgery as it is unreactive. forms a passive oxide layer in air. identified in 1802 by ekeberg and isolated in 1820 by jons j. berzelius.
-- elements
Tantalum Definition from Science & Technology Dictionaries & Glossaries
| Mineralogy Database |
| Chemistry of the Elements |
Tantalum
Name: tantalum
Symbol: Ta
Atomic number: 73
Atomic weight: 180.9479 (1)
Group in periodic table: 5
Group name:
Period in periodic table: 6
Block in periodic table: d-block
CAS registry ID: 7440-25-7
Tantalum is a greyish silver, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which can be used as a filament for evaporating metals such as aluminium. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulphur trioxide. The element has a melting point exceeded only by tungsten and rhenium.
Name: tantalum
Symbol: Ta
Atomic number: 73
Atomic weight: 180.9479 (1)
Group in periodic table: 5
Group name:
Period in periodic table: 6
Block in periodic table: d-block
CAS registry ID: 7440-25-7
Tantalum is a greyish silver, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which can be used as a filament for evaporating metals such as aluminium. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulphur trioxide. The element has a melting point exceeded only by tungsten and rhenium.
Tantalum Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Tantalum
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Tantalum Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Tantalum
Tantalum (IPA: ) (formerly tantalium, IPA: ) is a chemical element in the periodic table that has the symbol Ta and atomic number 73. A rare, hard, blue-gray, lustrous, transition metal, tantalum is highly corrosion-resistant and occurs naturally in the mineral tantalite.
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