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A ternary compound containing H, O, and another element, often a nonmetal.

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Delocalization

Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

Isomorphous

Refers to crystals having the same atomic arrangement.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

Electronic Transition

The transfer of an electron from one energy level to another.

Percent Composition

The mass percent of each element in a compound.

Detergent

A soap-like emulsifer that contains a sulfate, SO3 or a phosphate group instead of a carboxylate group.

Mass Spectrometer

An instrument that measures the charge-to-mass ratio of charged particles.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

Inhibitory Catalyst

An inhibitor, a catalyst that decreases the rate of reaction.

Activation Energy

Amount of energy that must be absorbed by reactants in their ground states to reach the transition state so that a reaction can occur. In other words, activation energy is the minimum energy required for a chemical reaction to occur.