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An atom consists of a small, heavy nucleus surrounded by a relatively large, light cloud of electrons. An atomic nucleus consists of 1 or more protons and 0 or more neutrons. Protons and neutrons are, in turn, made of quarks. Each type of atom corresponds to a specific chemical element. To date, 118 elements have been discovered or created.
Richard Gordon FitzGerald Uniacke, FRSAI (19 August 1867 – 11 November 1934) [1] was a British genealogist and librarian. He was the eldest son of the Rev. Robert FitzGerald Uniacke, late vicar of Tandridge, Surrey , a descendant of an old Irish family, the Uniackes of Uniacke and Castleton, County Cork. [ 2 ]
A Boy and His Atom is a 2013 stop-motion animated short film released on YouTube by IBM Research. One minute in length, it was made by moving carbon monoxide molecules with a scanning tunneling microscope , a device that magnifies them 100 million times.
A pioneering system of plant taxonomy, Linnaeus's Systema Naturae, Leiden, 1735 This list of systems of plant taxonomy presents "taxonomic systems" used in plant classification.
The current theoretical model of the atom involves a dense nucleus surrounded by a probabilistic "cloud" of electrons. Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries.
In the rock-salt structure, each of the two atom types forms a separate face-centered cubic lattice, with the two lattices interpenetrating so as to form a 3D checkerboard pattern. The rock-salt structure has octahedral coordination : Each atom's nearest neighbors consist of six atoms of the opposite type, positioned like the six vertices of a ...
Plants are the eukaryotes that form the kingdom Plantae; they are predominantly photosynthetic.This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria to produce sugars from carbon dioxide and water, using the green pigment chlorophyll.
A Is for Atom (1953) is a 14-minute promotional animated short documentary film created by John Sutherland and sponsored by General Electric (GE). The short documentary, which is now in the public domain, explains what an atom is, how nuclear energy is released from certain kinds of atoms, the peacetime uses of nuclear power, and the by-products of nuclear fission.