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  2. Electron configuration - Wikipedia

    en.wikipedia.org/wiki/Electron_configuration

    Vacant s, d, and f orbitals have been shown explicitly, as is occasionally done, [28] to emphasise the filling order and to clarify that even orbitals unoccupied in the ground state (e.g. lanthanum 4f or palladium 5s) may be occupied and bonding in chemical compounds. (The same is also true for the p-orbitals, which are not explicitly shown ...

  3. Aufbau principle - Wikipedia

    en.wikipedia.org/wiki/Aufbau_principle

    The rule then predicts the electron configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 9 4s 2, abbreviated [Ar] 3d 9 4s 2 where [Ar] denotes the configuration of argon, the preceding noble gas. However, the measured electron configuration of the copper atom is [Ar] 3d 10 4s 1. By filling the 3d subshell, copper can be in a lower energy state.

  4. Atomic orbital - Wikipedia

    en.wikipedia.org/wiki/Atomic_orbital

    Atomic orbitals can be the hydrogen-like "orbitals" which are exact solutions to the Schrödinger equation for a hydrogen-like "atom" (i.e., atom with one electron). Alternatively, atomic orbitals refer to functions that depend on the coordinates of one electron (i.e., orbitals) but are used as starting points for approximating wave functions ...

  5. Molecular orbital diagram - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital_diagram

    The σ from the 2p is more non-bonding due to mixing, and same with the 2s σ. This also causes a large jump in energy in the 2p σ* orbital. The bond order of diatomic nitrogen is three, and it is a diamagnetic molecule. [12] The bond order for dinitrogen (1σ g 2 1σ u 2 2σ g 2 2σ u 2 1π u 4 3σ g 2) is three because two electrons are now ...

  6. Electronic band structure - Wikipedia

    en.wikipedia.org/wiki/Electronic_band_structure

    The single-electron Schrödinger equation is solved for an electron in a lattice-periodic potential, giving Bloch electrons as solutions = (), where k is called the wavevector. For each value of k , there are multiple solutions to the Schrödinger equation labelled by n , the band index, which simply numbers the energy bands.

  7. Marble Sculpture Bought for $6 and Used as Doorstop Could ...

    www.aol.com/marble-sculpture-bought-6-used...

    A marble sculpture bought for $6 and used as a doorstep could be about to make a fortune. The bust, made by French sculptor Edmé Bouchardon, could make over $3 million at auction after a local ...

  8. Electron shell - Wikipedia

    en.wikipedia.org/wiki/Electron_shell

    The direction of the red arrow indicates the order of state filling. Although it is sometimes stated that all the electrons in a shell have the same energy, this is an approximation. However, the electrons in one subshell do have exactly the same level of energy, with later subshells having more energy per electron than earlier ones. This ...

  9. Opinion: Athletes will come to regret their 'Trump dance ...

    www.aol.com/opinion-athletes-come-regret-trump...

    Athletes doing "Trump dance" celebrations should think about what, exactly, they're glorifying.