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The absolute entropy of a substance in its standard state at 298 K.

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Lewis Base

Any species that can make available a share in an electron pair.

Mass Deficiency

The amount of matter that would be converted into energy if an atom were formed from constituent particles.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

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.

Phenol

Hydrocarbon derivative containing an [OH] group bound to an aromatic raing.

 

Use of diamonds

Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most brilliant and timeless gem.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Adhesive Forces

Forces of attraction between a liquid and another surface.

Nitric Acid

HNO3: A strong acid, it is toxic and can cause severe burns. Transparent colorless or yellowish, fuming, suffocating, caustic and corrosive liquid. Nitric acid boiling point is 83C. A 70 percent solution is used in the S.S.E. laboratory for junction depth measurements. Nitric acid is also present in the metal etch solution used for the Aluminum etch procedure.

Corrosion

Oxidation of metals in the presence of air and moisture.