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A noncrystalline solid with no well-defined ordered structure.

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    People use chemicals every day for a wide array of purposes, which can include work and house hold duties. Many of us fail to realize that we are actually handling potentially deadly chemicals when we simply clean the bathroom or wash the car. This brings to mind the reason why chemical safety is...

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Wild patina, is it so bad?

Usually this kind of patina appears on monuments. The most striking example is the Statue of Liberty in New York.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Electron Affinity

The amount of energy absorbed in the process in which an electron is added to a neutral isolated gaseous atom to form a gaseous ion with a 1- charge, has a negative value if energy is released.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

Nodal Plane

A region in which the probability of finding an electron is zero.

 

Heat of Fusion

The amount of heat required to melt one gram of solid at its melting point with no change in temperature. Usually expressed in J/g. The molar heat of fusion is the amount of heat required to melt one mole of a solid at its melting point with no change in temperature and is usually expressed in kJ/mol.