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. ...
preceding paragraph notwithstanding, I traded this sample for the next one listed under thorium, a square rod in a glass ampule. OK, not just for the rod, I got something else that must remain confidential for the time being, but will show...
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...
This glass-ampuled square rod of thorium was received in trade for the cut sheet listed in the previous sample description under thorium. It's permanently sealed in a glass ampule to prevent oxidation and to eliminate the possibility of radioactive contamination. Source: Anonymous Contributor: Anon...
A thorium atom has 90 electrons, of which four are valence electrons. Three atomic orbitals are theoretically available for the valence electrons to occupy: 5f, 6d, and 7s. Notwithstanding its position in the f-block of the periodic table, it has an anomalous [Rn]6d2 7s2 electron con...
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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...
118 Names and Symbols of the Periodic Table Quiz Thorium exhibits anoxidation stateof +4 in almost all of itscompounds. The Th4+ionforms many complex ions. The dioxide (ThO2), a very refractory substance, has many industrial applications; thorium nitrate has been available as a commercial sal...
主要翻译 英语中文 thoriumn(chemical element)(化学元素)SCSimplified Chinese钍tǔ 在单词列表中:Elements in the periodic table,更多…… 标题中含有单词 'thorium' 的论坛讨论: 标题中没有含有单词 'thorium' 。 访问Chinese 论坛。 帮助WordReference:在论坛上提问。