Different forms of the same element in the same physical state.
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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?
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Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.
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Chemistry can teach us about the composition of celestial bodies and determine their age.
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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...
- The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
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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.
xenon hexafluoride
A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.
Bomb Calorimeter
A device used to measure the heat transfer between system and surroundings at constant volume.
Suspension
A heterogeneous mixture in which solute-like particles settle out of solvent-like phase some time after their introduction.
Barometer
A device for measuring pressure.
Quantum Mechanics
Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.
Periodic Table of Elements
An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.
Stoichiometry
Description of the quantitative relationships among elements and compounds as they undergo chemical changes.
Ionization Isomers
Isomers that result from the interchange of ions inside and outside the coordination sphere.
Oxidizing Agent
The substance that oxidizes another substance and is reduced.
