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The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

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Capillary

A tube having a very small inside diameter.

Boron Hydrides

Binary compounds of boron and hydrogen.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Features of the Scanning Tunneling Microscope

The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types.

The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The device is based on a complex process of "tunneling" electrons between the material and the tip of a probe.

Bomb Calorimeter

A device used to measure the heat transfer between system and surroundings at constant volume.

ytterbium

A rare metallic element found in gadolinite and forming compounds resembling those of yttrium. Symbol: Yb, at. wt.: 173.04, at. no.: 70, sp. gr.: 6.96. Cf."rare-earth element."

 

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.