Closed glass tube containing a gas under low pressure, with electrodes near the ends and a luminescent screen at the end near the positive electrode, produces cathode rays when high voltage is applied.
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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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Chemical Safety
People use chemicals every day for a wide array of purposes, which can include work and house hold duties. Many of us fail to realize that we are actually handling potentially deadly chemicals when we simply clean the bathroom or wash the car. This brings to mind the reason why chemical safety is...
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What's In Your Beverage? How to Ensure Quality Control with CO2 Analytical Support
Calibration standards, performance audits, and the FDA's never-ending safety, labeling, and inspection requirements are just the tip of the iceberg when it comes to dealing with the increasingly stringent quality control standards of the beverage industry. As these quality standards become...
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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Gas of rotten eggs
If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.
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Hydrogenation
The reaction in which hydrogen adds across a double or triple bond.
Colloid
A heterogeneous mixture in which solute-like particles do not settle out.
Percent by Mass
100% times the actual yield divided by theoretical yield.
Electrochemistry
Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.
Critical Temperature
The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.
Percentage Ionization
The percentage of the weak electrolyte that ionizes in a solution of given concentration.
Disproportionation Reactions
Redox reactions in which the oxidizing agent and the reducing agent are the same species.
Formula
Combination of symbols that indicates the chemical composition of a substance.
Saccharic acid
A white, needlelike, crystalline, water-soluble solid or syrup, C6H10O8, usually made by the oxidation of cane sugar, glucose, or starch by nitric acid. Also called "Glucaric acid."
Quantum Numbers
Numbers that describe the energies of electrons in atoms, derived from quantum mechanical treatment.
