A natural deposit containing a mineral of an element to be extracted.
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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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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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What are Compound Microscopes?
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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Creating Malachite egg
One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...
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Diamonds Are Forever
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?
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Law of Conservation of Energy
Energy cannot be created or destroyed, it may be changed from one form to another.
Reaction Stoichiometry
Description of the quantitative relationships among substances as they participate in chemical reactions.
Flash Point
The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.
Nucleus
The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.
Fat
Solid triester of glycerol and (mostly) saturated fatty acids.
Polymorphous
Refers to substances that crystallize in more than one crystalline arrangement.
Double Salt
Solid consisting of two co-crystallized salts.
Critical Pressure
The pressure required to liquefy a gas (vapor) at its critical temperature.
Fractional Distillation
The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.
Hydrometer
A device used to measure the densities of liquids and solutions.
