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1. • 2 shells

     • Carbon has 2 shells, K and L, with 2 electrons in the K shell, leaving 4 electrons in the L shell.
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     Octet Rule: Definition, Explanation, Exceptions And Examples

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   How many electrons occupy a n 1 2 shell?

   • The n = 1 shell is filled with two electrons and three electrons will occupy the n = 2 shell. Because any s subshell can contain only two electrons, the fifth electron must occupy the next energy level, which will be a 2 p orbital. There are three degenerate 2 p orbitals ( ml = −1, 0, +1) and the electron can occupy any one of these p orbitals.

   3.4: Electronic Structure of Atoms (Electron Configurations)

   chem.libretexts.org/Bookshelves/General_Chemistry/Chemistry_-_Atoms_First_1e_(OpenSTAX)/03:_Electronic_Structure_and_Periodic_Properties/3.4:_Electronic_Structure_of_Atoms_(Electron_Configurations)

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   How many electrons can a shell hold?

   • The shell closest to the nucleus, 1n, can hold two electrons, while the next shell, 2n, can hold eight, and the third shell, 3n, can hold up to eighteen. The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms.

   The periodic table, electron shells, and orbitals - Khan Academy

   www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:atomic-structure-and-electron-configuration/a/the-periodic-table-electron-shells-and-orbitals-article

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   Which electron shell has a different energy level?

   • Each electron shell has a different energy level, with those shells closest to the nucleus being lower in energy than those farther from the nucleus. By convention, each shell is assigned a number and the symbol n—for example, the electron shell closest to the nucleus is called 1n.

   The periodic table, electron shells, and orbitals - Khan Academy

   www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:atomic-structure-and-electron-configuration/a/the-periodic-table-electron-shells-and-orbitals-article

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   What is an electron shell in chemistry?

   • 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 farther and farther from the nucleus.

   Electron shell - Wikipedia

   en.wikipedia.org/wiki/Electron_shell

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3. www.khanacademy.org › science › ap-chemistry-betaThe periodic table, electron shells, and orbitals - Khan Academy

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   All atoms are made up of energy levels (called shells) that hold 1 or more subshells. Each subshell holds a certain type of orbit. Each individual subshell has slightly varying energies from its "shell" energy level, depending on the distance from the nucleus.

4. chem.libretexts.org › Courses › South_Puget_Sound3.7: Electrons and Valence Shells - Chemistry LibreTexts

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   Jul 20, 2023 · These orbits form electron shells or energy levels, which are a way of visualizing the number of electrons in the outermost shells. These energy levels are designated by a number and the symbol “n.” For example, 1n represents the first energy level located closest to the nucleus.

5. chem.libretexts.org › Courses › Howard_UniversityChapter 2.5: Atomic Orbitals and Their Energies - Chemistry ...

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   As a result of the Z 2 dependence of energy in Equation 2.24, electrons in the 1s orbital of carbon, which has a nuclear charge of +6, lie roughly 36 times lower in energy than those in the hydrogen 1s orbital, and the 1s orbital of tin, with an atomic number of 50 is roughly 2500 times lower still.

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6. chem.libretexts.org › Bookshelves › General_Chemistry3.4: Electronic Structure of Atoms (Electron Configurations)

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   Aug 14, 2020 · The electron configuration and the orbital diagram are: Following hydrogen is the noble gas helium, which has an atomic number of 2. The helium atom contains two protons and two electrons. The first electron has the same four quantum numbers as the hydrogen atom electron ( n = 1, l = 0, ml = 0, ms = +1 2 m s = + 1 2 ).

7. en.wikipedia.org › wiki › Electron_shellElectron shell - Wikipedia

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   A useful guide when understanding electron shells in atoms is to note that each row on the conventional periodic table of elements represents an electron shell. Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold ...

8. openoregon.pressbooks.pub › gschemistry › chapter8.4 Electronic Structure of Atoms – Introduction to Chemistry

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   An atom of the alkaline earth metal beryllium, with an atomic number of 4, contains four protons in the nucleus and four electrons surrounding the nucleus. The fourth electron fills the remaining space in the 2 s orbital. An atom of boron (atomic number 5) contains five electrons.

9. en.wikipedia.org › wiki › Valence_electronValence electron - Wikipedia

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   Carbon has four valence electrons and here a valence of four. Each hydrogen atom has one valence electron and is univalent. In chemistry and physics, valence electrons are electrons in the outermost shell of an atom, and that can participate in the formation of a chemical bond if the outermost shell is not closed.