General chemistry

General chemistry

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General chemistry

Van der waals radius

Chemistry; General chemistry

One half the distance between two nonbonded atoms, when attractive and repulsive forces between the atoms are balanced.

A crystal with no defects or impurities, made of completely identical repeating subunits. Further, a perfect crystal has only one possible arrangement of subunits, with every subunit making exactly ...

Voltaic pile

Chemistry; General chemistry

An early battery consisting of discs of dissimilar metals (usually zinc and copper) separated by moist paper or cloth soaked in an electrolyte solution.

Copolymer

Chemistry; General chemistry

A polymer composed of two or more different monomers . The different monomers can be linked randomly, or in repeating sequences, or in blocks, or as side chains off the main chain.

Kilo

Chemistry; General chemistry

Prefix used in the SI system meaning "one thousand of". For example 1 km means "one thousand meters"; 2.8 kg could also be written "2.8 × 103 g" or "2800 g".

Shielding

Chemistry; General chemistry

Electrons in orbitals with high penetration can shield the nucleus from less penetrating electrons. Because they are closer to the nucleus on average, they repel those farther away and lessen the ...

Atomic weight

Chemistry; General chemistry

The average mass of an atom of an element, usually expressed in atomic mass units . The terms mass and weight are used interchangeably in this case. The atomic weight given on the periodic table is ...