A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.
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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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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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Gas of rotten eggs
If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.
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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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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Central Atom
An atom in a molecule or polyatomic ion that is bonded to more than one other atom.
Standard Reaction
A reaction in which the numbers of moles of reactants shown in the balanced equation, all in their standard states, are completely converted to the numbers of moles of products shown in the balanced equation, also sall at their standard state.
Hund's Rule
All orbitals of a given sublevel must be occupied by single electrons before pairing begins.
Oxidation-reduction Reactions
Reactions in which oxidation and reduction occur, also called redox reactions.
Enthalpy
The heat content of a specific amount of substance, defined as E= PV.
Eluant or eluent
The solvent used in the process of elution, as in liquid chromatography.
Half-Life
The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.
Insoluble Compound
A very slightly soluble compound.
Hess' Law of Heat Summation
The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.
Alkynes
Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.
