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Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

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Fluids

Substances that flow freely, gases and liquids.

Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

Pineapple literally "erodes" the tongue

Everyone who has ever tried fresh pineapple knows that if you eat too much, your lips and tongue hurt for a while. This is because the pineapple contains an enzyme called bromelain. This enzyme literally "erodes" the tongue.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Lanthanides

Elements 58 to 71 (after lanthanum).

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.

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

Matter

Anything that has mass and occupies space.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

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?