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A solution that has been titrated against a primary standard. A standard solution is a secondary standard.

 

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Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Doublet

Two peaks or bands of about equal intensity appearing close together on a spectrogram.

Band of Stability

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

Law of Combining Volumes (Gay-Lussac's Law)

At constant temperature and pressure, the volumes of reacting gases (and any gaseous products) can be expressed as ratios of small whole numbers.

 

Linear Accelerator

A device used for accelerating charged particles along a straight line path.

Lanthanides

Elements 58 to 71 (after lanthanum).

Cohesive Forces

All the forces of attraction among particles of a liquid.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Covalent Bond

Chemical bond formed by the sharing of one or more electron pairs between two atoms.