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Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

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Hydrolysis

The reaction of a substance with water or its ions.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

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 elite jewelry.

Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

Emission Spectrum

Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.

 

Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

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.

Concentration

Amount of solute per unit volume or mass of solvent or of solution.