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  2. Bohr–Sommerfeld model - Wikipedia

    en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    Orbitals of the Radium. (End plates to [1]) 5 electrons with the same principal and auxiliary quantum numbers, orbiting in sync. ([2] page 364) The Sommerfeld extensions of the 1913 solar system Bohr model of the hydrogen atom showing the addition of elliptical orbits to explain spectral fine structure.

  3. Nuclear structure - Wikipedia

    en.wikipedia.org/wiki/Nuclear_structure

    The liquid drop model is one of the first models of nuclear structure, proposed by Carl Friedrich von Weizsäcker in 1935. [5] It describes the nucleus as a semiclassical fluid made up of neutrons and protons , with an internal repulsive electrostatic force proportional to the number of protons.

  4. National Institute of Open Schooling - Wikipedia

    en.wikipedia.org/wiki/National_Institute_of_Open...

    The National Institute of Open Schooling (NIOS), formerly National Open School is a national level board of education in India, controlled and managed by the Government of India. It was established by the Ministry of Education (erstwhile Ministry of Human Resource Development) of the Government of India in 1989.

  5. Bohr model - Wikipedia

    en.wikipedia.org/wiki/Bohr_model

    When Bohr began his work on a new atomic theory in the summer of 1912 [8]: 237 the atomic model proposed by J J Thomson, now known as the Plum pudding model, was the best available. [9]: 37 Thomson proposed a model with electrons rotating in coplanar rings within an atomic-sized, positively-charged, spherical volume. Thomson showed that this ...

  6. Rutherford model - Wikipedia

    en.wikipedia.org/wiki/Rutherford_model

    In a May 1911 paper, [8] Rutherford presented his own physical model for subatomic structure, as an interpretation for the unexpected experimental results. [3] In it, the atom is made up of a central charge (this is the modern atomic nucleus, though Rutherford did not use the term "nucleus" in his paper). Rutherford only committed himself to a ...

  7. Electron configuration - Wikipedia

    en.wikipedia.org/wiki/Electron_configuration

    In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. [1] For example, the electron configuration of the neon atom is 1s 2 2s 2 2p 6 , meaning that the 1s, 2s, and 2p subshells are occupied by two, two, and six ...

  8. When do the NFL playoffs start? Schedule, start date for 2024 ...

    www.aol.com/nfl-playoffs-start-schedule-start...

    The NFL playoffs begin with super wild-card weekend: a six-game slate that runs from Saturday, Jan. 11 to Monday, Jan. 13. This year, it will feature two games on Saturday, three games on Sunday ...

  9. Atomic orbital - Wikipedia

    en.wikipedia.org/wiki/Atomic_orbital

    Atomic orbitals are basic building blocks of the atomic orbital model (or electron cloud or wave mechanics model), a modern framework for visualizing submicroscopic behavior of electrons in matter. In this model, the electron cloud of an atom may be seen as being built up (in approximation) in an electron configuration that is a product of ...