A theory of chemical bonding based upon the postulated existence of molecular orbitals.
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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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Why do copper products change color, and what is the name of the process?
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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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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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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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Coordination Compound or Complex
A compound containing coordinate covalent bonds.
Paramagnetism
Attraction toward a magnetic field, stronger than diamagnetism, but still weak compared to ferromagnetism.
Leclanche Cell
A common type of dry cell.
Ternary Acid
A ternary compound containing H, O, and another element, often a nonmetal.
Ground State
The lowest energy state or most stable state of an atom, molecule or ion.
Atomic Number
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Dissociation
In aqueous solution, the process in which a solid ionic compound separates into its ions.
Allotropic Modifications (Allotropes)
Different forms of the same element in the same physical state.
Oxidation
An algebraic increase in the oxidation number, may correspond to a loss of electrons.
Pineapple literally "erodes" the tongue
Everyone who has ever tried fresh pineapple knows that if you eat too much, your lips and tongue hurt for a while. This is because the pineapple contains an enzyme called bromelain. This enzyme literally "erodes" the tongue.
