AO meaning in Chemistry ?

Answer:

What is Atomic Orbital mean?

In atomic theory and quantum mechanics, an atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus. The term atomic orbital may also refer to the physical region or space where the electron can be calculated to be present, as predicted by the particular mathematical form of the orbital.

Each orbital in an atom is characterized by a unique set of values of the three quantum numbers n, ℓ, and ml, which respectively correspond to the electron's energy, angular momentum, and an angular momentum vector component (the magnetic quantum number). Each such orbital can be occupied by a maximum of two electrons, each with its own projection of spin m s {\displaystyle m_{s}} . The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively. These names, together with the value of n, are used to describe the electron configurations of atoms. They are derived from the description by early spectroscopists of certain series of alkali metal spectroscopic lines as sharp, principal, diffuse, and fundamental. Orbitals for ℓ > 3 continue alphabetically, omitting j (g, h, i, k, ...) because some languages do not distinguish between the letters "i" and "j".

Atomic orbitals are the basic building blocks of the atomic orbital model (alternatively known as the electron cloud or wave mechanics model), a modern framework for visualizing the submicroscopic behavior of electrons in matter. In this model the electron cloud of a multi-electron atom may be seen as being built up (in approximation) in an electron configuration that is a product of simpler hydrogen-like atomic orbitals. The repeating periodicity of the blocks of 2, 6, 10, and 14 elements within sections of the periodic table arises naturally from the total number of electrons that occupy a complete set of s, p, d, and f atomic orbitals, respectively, although for higher values of the quantum number n, particularly when the atom in question bears a positive charge, the energies of certain sub-shells become very similar and so the order in which they are said to be populated by electrons (e.g. Cr = [Ar]4s13d5 and Cr2+ = [Ar]3d4) can only be rationalized somewhat arbitrarily.

reference

Full Form	Category
Atlantic Ocean	Academic & Science
Alpha Omega	Academic & Science
Aspheric Optics	Academic & Science
Astronomical Observatory	Academic & Science
Agent Orange (Toxic)	Academic & Science
Arctic Oscillation	Academic & Science
Academic Office	Academic & Science
Account Of	Accounts and Finance
Amount of ....	Accounts and Finance
Angelic Oceans	Business
Assessment Objective	Business
Aubrey Organics	Business
American Optical Company	Business
Accrediting Organization	Business
Antique and Old	Business
Arentzen Ohlander Glass Studio	Business
Aqueous Oxygen	Chemistry
Aldehyde Oxidase	Chemistry
Atomic Orbital	Chemistry
Accompaniment Only	Community
Antiquites Orientales	Community
All Outdoors	Community
Adults Only	Community
Alon Oleartchik, musician	Community
Altogether Outdoors	Community
Analog Output	Computer Hardware
Auto Off	Computer Hardware
Autonomous Object	Computing
Acousto Optic	Electronics
Analog Out	Electronics
Always Open	Electronics
Alpha Oscillator	Electronics
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Auxiliary Oiler	General
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Athol Orange	General
Anal Orfice	General
Aoiro Ohki	General
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Authorize Only	General
Angry Outburst	General
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Automags Online	General
Associate Post Office	General
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Argentum Online	General
Annoying Orange	General
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Angola AO	General
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Audi Only	General
Acronym Or	General
Aesthetic Olympian	General
and AO	General
Announcement of Opportunity	General
Audi Option	General
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Action Office	General
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Average of OC	General
Attribute On	General
Ass Ole	General
Alternative Option	General
AntiOxidant	General
Ancient One	General
Automatic Metal Products	Governmental
All Off	Governmental
Auxiliary Office	Governmental
Aesthetic Objective	Governmental
Assembling Objects	Governmental
Aviation Officer	Governmental
Air Observer	Governmental
American Overseas	Governmental
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Liga Comunista - Acuerdo Obrero	International
Anime Online	Internet
Among Others	Internet
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Abdominal Obesity	Medical
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Acid Output	Medical
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Angle Of ....	Medical
Aorta	Medical
Access Orlando	Medical
All The Other	Messaging
Anarchy Online	Messaging
Administrative Occupations	Military and Defence
Authorizing Official	Military and Defence
Area of Operations	Military and Defence
Action Officer	Military and Defence
Aerial Observer	Military and Defence
Approval Order	Military and Defence
Air Officer	Military and Defence
Army Orders	Military and Defence
Administration Officer	Military and Defence
Aviation Ordnanceman	Military and Defence
Administrative Officer	Military and Defence
Aviatsionnaya Oskolochnyang (aircraft Fragmentation Ammunition)	Military and Defence
Area of Operation	Military and Defence
Agent Orange	Military and Defence
Advanced Optics	Physics Related
Adaptive Optics	Physics Related
Authorized Occupant	Real Estate
Administrative Ownership	Real Estate
Officer of the Order of Australia	Regional
Appalachian and Ohio Railroad	Regional
Australian Open	Regional
Arc Objects	Softwares
Assembly Order	Space Science
Atomic Oxygen	Space Science
Amateur Owner	Sports
Australian Airlines	Transport & Travel