A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.
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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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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.
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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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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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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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Coulometry
The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.
Radioactive Tracer
A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.
Film badge
A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.
xenon tetrafluoride
A colorless, crystalline compound, XeF4, prepared by heating a gaseous mixture of fluorine and xenon.
Pairing
A favourable interaction of two electrons with opposite m , values in the same orbital.
Stoichiometry
Description of the quantitative relationships among elements and compounds as they undergo chemical changes.
Linear Accelerator
A device used for accelerating charged particles along a straight line path.
Heterogeneous Catalyst
A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.
Secondary Standard
A solution that has been titrated against a primary standard. A standard solution is a secondary standard.
Periodic Law
The properties of the elements are periodic functions of their atomic numbers.
