thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel. Thorium was discovered (1828) by Swedish chemist Jöns Jacob Berzelius. It is silvery white but turns gray or black on exposure to air. It is...
years and is used as a nuclear fuel. Thorium is used in magnesium alloys, and its oxide is widely used in gas mantles of Welsbach burners. Atomic number 90; atomic weight 232.038; melting point 1,750°C; boiling point 4,788°C; specific gravity 11.72; valence 4. SeePeriodic Table. ...
Periodic Table of the Elements: ThoriumPeriodic Table of the Elements: Thorium from The Columbia Encyclopedia, 6th ed.. Read Periodic Table of the Elements: Thorium from The Columbia Encyclopedia, 6th ed. now at Questia.The Columbia Encyclopediath ed...
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Description and origins of Cutout sheets, 20g, a sample of the element Thorium in the Periodic Table.
It is a member of the actinide series in Group 3 of the periodic table and is sometimes classed as one of the rare-earth metals. When pure, the metal is stable and resists oxidation, but it is usually contaminated with small amounts of the oxide, which cause it to tarnish rapidly. It...
6. ^ a b c d Hyde, Earl K. (1960). The radiochemistry of thorium. Subcommittee on Radiochemistry, National Academy of Sciences—National Research Council. http://www.radiochemistry.org/periodictable/pdf_books/pdf/rc000034.pdf. 7. ^ a b c "Toxicological Profile Information Sheet". Departm...
thorium (Th), radioactivechemical elementof theactinoid seriesof theperiodic table,atomic number90; it is a usefulnuclear reactorfuel. Thorium was discovered (1828) by Swedish chemistJöns Jacob Berzelius. It is silvery white but turns gray or black on exposure to air. It is about half as...
It seems I guessed right about the correct method for shipping thorium, because these people certainly know what they are doing. I chose this sample to represent its element in myPhotographic Periodic Table Poster. The sample photograph includes text exactly as it appears in the poster, which yo...
There is continued burgeoning interest in metal–metal multiple bonding to further our understanding of chemical bonding across the periodic table. However, although polar covalent metal–metal multiple bonding is well known for the d and p blocks, it is relatively underdeveloped for actinides. Homo...