A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.
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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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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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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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Use of diamonds
Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most...
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Varieties of garnet minerals
The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...
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All Chemicals - Chemical Glossary
The Chemical Glossary currently has 651 chemical entries. You may search the Chemical Glossary by entering the keyword in the search box or by browsing the entire chemical glossary by letter in alphabetical order.
Melting Point
The temperature at which liquid and solid coexist in equilibrium, also the freezing point.
Helium
Discovered : by Sir William Ramsay in London, and independently by P.T. Cleve and N.A. Langlet in Uppsala, Sweden in 1895.
Origin : The name is derived from the Greek ‘helios’,sun.
Description :A colourless, odourless gas that is totally unreactive. It is extracted from natural gas wells, some of which contain gas that is 7% helium. It is used in deep sea diving for balloons and, as liquid helium, for low temperature research. The Earth’s atmosphere contains 5 parts per million by volume, totalling 400 million tons, but it is not worth extracting it from this source at present.
Atomic No:2 MAss No:4
Covalent Compounds
Compounds containing predominantly covalent bonds.
Turning iron nail into copper nail
This simple chemical experiment shows the so-called process of copper plating of metal products. Copper has the ability to deposit on a metal surface.
History of diamonds
Diamond has been known for about 5 thousand years. Historians suggest that it was first discovered in India in river placers. It has long been credited with magical properties, and the largest famous crystals and products from them are shrouded in a halo of mystical legends.
Spectator Ions
Ions in a solution that do not participate in a chemical reaction.
Solubility Product Constant
Equilibrium constant that applies to the dissolution of a slightly soluble compound.
Alcohol
Hydrocarbon derivative containing an --OH group attached to a carbon atom not in an aromatic ring. Alcohols are a class of organic compounds containing the hydroxyl group, OH, attached to a carbon atom.
Bubbles
Have you ever noticed that soap bubbles go up in winter and fall down in summer? The reason is that warm air is lighter than cold. And in winter the difference between the air temperature in the room (especially near the windows) and the one you exhale into the bubble is enough to overcome the heaviness of its shell.
