Atom | Definition, Structure, History, Examples, Diagram, & Facts ...
Dec 25, 2025 · Chemical elements are made up of only one type of atom—gold contains only gold atoms, and neon contains only neon atoms--and they are ranked in order of their atomic number (the …
Bohr model | Description, Hydrogen, Development, & Facts | Britannica
Nov 26, 2025 · The Bohr model is a description of the structure of atoms proposed in 1913 by the Danish physicist Niels Bohr. The Bohr model of the atom, a radical departure from earlier, classical …
Basic concept and structure of an atom | Britannica
Understand the basic concept and structure of an atom The Editors of Encyclopaedia Britannica
Atomic model | Definition, History, Development, Examples, & Facts ...
Nov 27, 2025 · Atomic model, in physics, a model used to describe the structure and makeup of an atom. Atomic models have gone through many changes over time, evolving as necessary to fit …
Rutherford model | Definition, Description, Image, & Facts | Britannica
Nov 7, 2025 · The Rutherford atomic model was correct in that the atom is mostly empty space. Most of the mass is in the nucleus, and the nucleus is positively charged. Far from the nucleus are the …
Atom - Nuclear Shell, Structure, Model | Britannica
Dec 25, 2025 · Atom - Nuclear Shell, Structure, Model: Many models describe the way protons and neutrons are arranged inside a nucleus. One of the most successful and simple to understand is the …
Thomson atomic model | Description, Plum Pudding, & Image
Thomson atomic model, earliest theoretical description of the inner structure of atoms, proposed c. 1900 by Lord Kelvin and supported by J.J. Thomson.
Shell atomic model | Description, Configuration, Chemistry, Proposed …
Shell atomic model, simplified description of the structure of atoms that was first proposed by the physicists J. Hans D. Jensen and Maria Goeppert Mayer working independently in 1949.
Non-Crystalline, Atomic Structure, Glasses - Britannica
This program has been successfully carried out for many amorphous solids, so there is now much that is known about their atomic-scale structure. In contrast to the complete information available for …
Chemical bonding - Atomic Structure, Intermolecular Forces, Covalent ...
Dec 9, 2025 · The modern version of atomic structure begins with Ernest Rutherford’s recognition that an atom consists of a single, central, massive, positively charged nucleus surrounded by electrons.