The smallest repeating unit of a substance. The molecule for nonionic substances
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Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...
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In this paper I describe (theoretically) the method(s) of automated protein discovery and synthesis.
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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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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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Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?
A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.
A hypothetical gas that obeys exactly all postulates of the kinetic-molecular theory.
Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.
The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.
The amount of energy absorbed in the process in which an electron is added to a neutral isolated gaseous atom to form a gaseous ion with a 1- charge, has a negative value if energy is released.
Freezing Point Depression
The decrease in the freezing point of a solvent caused by the presence of a solute.ing Point
Lead Storage Battery
Secondary voltaic cell used in most automobiles.
The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.
An equilibrium constant for a hydrolysis reaction.
Binary compounds of boron and hydrogen.
Spontaneous decomposition of an atom.
Substance that stoichiometrically limits the amount of product(s) that can be formed.
Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.
A neutron ejected at high kinetic energy in a nuclear reaction.
The ratio of the density of a substance to the density of water.
Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.
Description of the quantitative relationships among elements and compounds as they undergo chemical changes.
Electron emitted from the nucleus when a neuton decays to a proton and an electron.
Discovered: known in India and China before 1500 and to the Greeks and Romans before 20 BC as the copper-zinc alloy brass
Origin: The name is derived from the German ‘Zink’.
Atomic no: 30
Mass No: 65
Description: A grey metal with a blue tinge. World production exceeds 7 million tons a year, and it is used to galvanise iron to prevent it rusting. It is also employed in alloys and batteries, and as zinc oxide to stabilise rubber and plastics. Zinc is essential for all living things, and is important for growth and development. The average human body contains about 2.5 grams and takes in about 15 milligrams per day. Some foods have above average levels of zinc, including herring, beef, lamb, sunflower seeds and cheese.
A substance capable of causing or producing cancer in mammals.