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Elements and Compounds01:27

Elements and Compounds

Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.ElementsElements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
Elements: Chemical Symbols and Isotopes02:31

Elements: Chemical Symbols and Isotopes

A chemical symbol is an abbreviation used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. The same symbol is used to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
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Chemical Formulas02:52

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A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Chemical Symbols01:09

Chemical Symbols

A chemical symbol is an abbreviation that is used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. We use the same symbol to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
Some symbols are derived from the common name of the element; others are abbreviations of the name in another language. Most symbols have one or two letters, but three-letter symbols have been used...

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Fluoride complexation of element 104, rutherfordium.

Hiromitsu Haba1, Kazuaki Tsukada, Masato Asai

  • 1Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan. haba@riken.jp

Journal of the American Chemical Society
|April 22, 2004
PubMed
Summary

Rutherfordium fluoride complexation differs from lighter homologs due to relativistic effects. This study used atom-at-a-time anion-exchange chromatography to investigate rutherfordium

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Area of Science:

  • Nuclear Chemistry
  • Radiochemistry
  • Inorganic Chemistry

Background:

  • Rutherfordium (Rf), element 104, is a superheavy element whose chemical properties are predicted to be significantly influenced by relativistic effects.
  • Understanding the solution chemistry of Rf, particularly its complexation behavior, is crucial for its identification and characterization.

Purpose of the Study:

  • To investigate the fluoride complexation of rutherfordium (Rf) using anion-exchange chromatography.
  • To compare the chromatographic behavior of Rf with lighter Group 4 elements (Zirconium, Zirconium, and Hafnium, Hafnium) in hydrofluoric acid solutions.
  • To explore the influence of relativistic effects on the chemical properties of Rf.

Main Methods:

  • Rutherfordium-261 (261Rf) was produced via the 248Cm(18O,5n)261Rf nuclear reaction.
  • Atom-at-a-time anion-exchange chromatography was employed to study the adsorption behavior of 261Rf.
  • The chromatographic separation was performed in varying concentrations of hydrofluoric acid (1.9–13.9 M).
  • Comparative studies were conducted using Zirconium (Zr) and Hafnium (Hf) under identical conditions.

Main Results:

  • The adsorption behavior of rutherfordium (Rf) on anion-exchange resin in hydrofluoric acid was distinct from that of Zirconium (Zr) and Hafnium (Hf).
  • Rf exhibited significantly different fluoride complexation compared to its lighter homologs, Zr and Hf.
  • The observed differences suggest a deviation from simple periodic trends for element 104.

Conclusions:

  • The distinct fluoride complexation of rutherfordium (Rf) indicates the significant role of relativistic effects in its chemistry.
  • Anion-exchange chromatography is a viable technique for studying the solution chemistry of superheavy elements like Rf.
  • Further theoretical and experimental studies are warranted to fully elucidate the impact of relativistic effects on Rf and other superheavy elements.