Atom Definition. An atom is the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of protons and neutrons with electrons orbiting this nucleus. However, an atom can consist of a single proton (i.e., the protium isotope of hydrogen) as a nucleus.
Mosaic art flourished in the Byzantine Empire from the 6th to the 15th centuries; that tradition was adopted by the Norman kingdom in Sicily in the 12th century, by eastern-influenced Venice, and among the Rus in Ukraine.osaic is an art form which uses small pieces of materials placed together to create a unified whole. The materials commonly used are marble or other stone, glass, pottery, mirror or foil-backed glass, or shells.
Early rock art also first appeared in the Neolithic. The advent of metalworking in the Bronze Age brought additional media available for use in making art, an increase in stylistic diversity, and the creation of objects that did not have any obvious function other than art.amous for their rock art, the caves are located in a rural area on the outskirts of Hargeisa. They contain some of the earliest known cave paintings in the Horn of Africa, many of which depict pastoral scenes. Laas Geel's rock art is estimated to date back to somewhere between 9,000 â 8,000 and 3,000 BCE.