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The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

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Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Isoelectric

Having the same electronic configurations.

Electrode Potentials

Potentials, E, of half-reactions as reductions versus the standard hydrogen electrode.

Polarimeter

A device used to measure optical activity.

Formula

Combination of symbols that indicates the chemical composition of a substance.

 

Percent by Mass

100% times the actual yield divided by theoretical yield.

High Spin Complex

Crystal field designation for an outer orbital complex, all t2g and eg orbitals are singly occupied before any pairing occurs.

Catalyst

A substance that speeds up a chemical reaction without being consumed itself in the reaction.
A substance that alters (usually increases) the rate at which a reaction occurs.

Dispersing Medium

The solvent-like phase in a colloid.

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.