Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.
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The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types. The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The...
A physical state of matter which exists at extremely high temperatures in which all molecules are dissociated and most atoms are ionized.
Covalent bond in which there is an unsymmetrical distribution of electron density.
In describing crystals, the number of nearest neighbours of an atom or ion. The number of donor atoms coordinated to a metal.
The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.
Noble Gases (Rare Gases)
Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.
A device used to measure optical activity.
The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.
Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.
Refers to species that have only six electrons in the highest energy level of the central element (many Lewis acids).
A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22
Forces of attraction between a liquid and another surface.
A hypothetical gas that obeys exactly all postulates of the kinetic-molecular theory.
A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.
Anything that has mass and occupies space.
The number (6.022x10^23) of atoms, molecules or particles found in exactly 1 mole of substance.
Of the same energy.
A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.
Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.
Faraday's Law of Electrolysis
One equivalent weight of a substance is produced at each electrode during the passage of 96,487 coulombs of charge through an electrolytic cell.
Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.