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Atomic Spectroscopy, by W.C. Martin and W.L. Wiese in Atomic, Molecular, & Optical Physics Handbook, ed. by G.W.F. Drake (AIP, Woodbury, NY, 1996) Chapter 10, pp. 135–153. This website is also cited in the CRC Handbook as source of Section 1, subsection Electron Configuration of Neutral Atoms in the Ground State.
Orbitals with ℓ = 1, 2 and 3 are denoted as p, d and f respectively. The set of orbitals for a given n and ℓ is called a subshell, denoted . The superscript y shows the number of electrons in the subshell. For example, the notation 2p 4 indicates that the 2p subshell of an atom contains 4 electrons.
In chemistry and atomic physics, an electron shell may be thought of as an orbit that electrons follow around an atom's nucleus.The closest shell to the nucleus is called the "1 shell" (also called the "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on further and further from the nucleus.
The empty f orbitals in lanthanum, actinium, and thorium contribute to chemical bonding, [26] [27] as do the empty p orbitals in transition metals. [ 28 ] Vacant s, d, and f orbitals have been shown explicitly, as is occasionally done, [ 29 ] to emphasise the filling order and to clarify that even orbitals unoccupied in the ground state (e.g ...
[45] [49] In general, orbitals with the same value of n + ℓ are similar in energy, but in the case of the s-orbitals (with ℓ = 0), quantum effects raise their energy to approach that of the next n + ℓ group. Hence the periodic table is usually drawn to begin each row (often called a period) with the filling of a new s-orbital, which ...
The s subshell (ℓ = 0) contains only one orbital, and therefore the m ℓ of an electron in an s orbital will always be 0. The p subshell (ℓ = 1) contains three orbitals, so the m ℓ of an electron in a p orbital will be −1, 0, or 1. The d subshell (ℓ = 2) contains five orbitals, with m ℓ values of −2, −1, 0, 1, and 2.
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The other two p-orbitals, p y and p x, can overlap side-on. The resulting bonding orbital has its electron density in the shape of two lobes above and below the plane of the molecule. The orbital is not symmetric around the molecular axis and is therefore a pi orbital. The antibonding pi orbital (also asymmetrical) has four lobes pointing away ...