A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.
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Ozone
We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.
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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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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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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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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Electronegativity
A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.
Interesting facts about metals
Metals have been used by people since ancient times. All the time the process of obtaining them was improved, useful alloys of various metals appeared. Let’s look at interesting facts about metals.
Saccharic
of or derived from saccharin or a saccharine substance.
Catenation
Bonding of atoms of the same element into chains or rings.
The bonding together of atoms of the same element to form chains.
The ability of an element to bond to itself.
xenon hexafluoride
A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.
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."
Nuclides
Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.
Domain
A cluster of atoms in a ferromagnetic substance, all of which align in the same direction in the presence of an external magnetic field.
Actual Yield
Amount of a specified pure product actually obtained from a given reaction. Compare with Theoretical Yield.
Periodicity
Regular periodic variations of properties of elements with atomic number (and position in the periodic table).
