An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of atoms. Atoms are very small; typical sizes are around 100pm. Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and typically a similar number of neutrons. More than 99.94% of an atom's mass is in the nucleus. (wikipedia)
Interesting fact - the nucleus of an atom is tiny compared to the total size of the atom. This geoart represents an atom, and is 1.2km across, at atom at this size, with electrons at a 1.2km diameter, would have a nucleus about the size of a grape.
Cache is a 2L sistema container.