General chemistry

General chemistry

Contributors in General chemistry

General chemistry

A gell is a sol in which the solid particles fuse or entangle to produce a rigid or semirigid mixture. For example, gelatin dissolved in water produces a sol of protein molecules. When the gelatin ...

Periodic table

Chemistry; General chemistry

An arrangement of the elements according to increasing atomic number that shows relationships between element properties.

Vulcanization

Chemistry; General chemistry

A process of combining rubber with sulphur or other substances that causes the polymer chains to crosslink, making them stronger and more elastic.

Coulomb

Chemistry; General chemistry

The SI unit of electric charge, equal to the amount of charge delivered by a current of 1 ampere running for 1 second. One mole of electrons has a charge of about 96487 C.

Lanthanide contraction

Chemistry; General chemistry

An effect that causes sixth period elements with filled 4f subshells to be smaller than otherwise expected. The intervention of the lanthanides increases the effective nuclear charge, which offsets ...

Significant figure

Chemistry; General chemistry

A convention for recording measurements. Measurements are rounded so that they contain only the digits up to and including the first uncertain digit, when the number is written in scientific ...