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General chemistry
Industry: Chemistry
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General chemistry
Zincography
Chemistry; General chemistry
Process of etching unprotected parts of a zinc plate with strong acids to produce a printing surface.
Mass number
Chemistry; General chemistry
The total number of protons and neutrons in an atom or ion. In nuclide symbols the mass number is given as a leading superscript. In isotope names (e.g. carbon-14, sodium-23) the mass number is ...
Standard entropy of reaction
Chemistry; General chemistry
A change in entropy associated with a reaction involving substances in their standard states . A superscript circle (°) distinguishes standard enthalpy changes from enthalpy changes which involve ...
Boiling point elevation
Chemistry; General chemistry
The boiling point of a solution is higher than the boiling point of the pure solvent. Boiling point elevation is a colligative property .
Homolog
Chemistry; General chemistry
A compound belonging to a series of compounds that differ by a repeating group. For example, propanol (CH3CH2CH2OH), n-butanol (CH3CH2CH2CH2OH), and n-pentanol (CH3CH2CH2CH2CH2OH) are homologs; they ...
Poise
Chemistry; General chemistry
A cgs unit of resistance to fluid flow (viscosity ). If a force of 1 dyne is needed to force two fluid layers with 1 cm2 area that are 1 cm apart past each other at a speed of 1 cm/s, the liquid ...
Zirconium
Chemistry; General chemistry
Element 40, atomic weight 91.22, a hard, grayish, highly flammable crystalline metal that dissolves in hot concentrated acids. Used in steel manufacture and in nuclear reactor chambers because of its ...
