An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.
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Chemistry of the sky
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Features of the Scanning Tunneling Microscope
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...
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Why do copper products change color, and what is the name of the process?
Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.
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What's In Your Beverage? How to Ensure Quality Control with CO2 Analytical Support
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Buret
A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.
Manometer
A two-armed barometer.
Metalloids
Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.
Molecular Orbital Theory
A theory of chemical bonding based upon the postulated existence of molecular orbitals.
Anode
In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.
Effective Molality
The sum of the molalities of all solute particles in a solution.
Moderator
A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.
Nernst Equation
Corrects standard electrode potentials for nonstandard conditions.
Shielding Effect
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.
ytterbium
A rare metallic element found in gadolinite and forming compounds resembling those of yttrium. Symbol: Yb, at. wt.: 173.04, at. no.: 70, sp. gr.: 6.96. Cf."rare-earth element."
