Atom

Atom - A unit of matter consisting of electrons, protons, neutrons, and other subatomic particles.

ion An atom or molecule with either positive or negative charges. See anion, cation.

Soil pH is a measurement of one aspect of the soil's chemical composition: the concentration of hydrogen ions (an ion is an electrically charged atom or molecule).

when it comes to peas, and corn, and lettuce, well, there is absolutely nothing to compare with the home garden ones, gathered fresh, in the early slanting sunlight, still gemmed with dew, still crisp and tender and juicy, ready to carry every atom ...

See also: Molecule, Plant, Spring, Genera, Level