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  2. www.khanacademy.org › v › valence-electronsValence electrons (video) | Khan Academy

    Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴. Created by Sal Khan.

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      This outermost shell is known as the valence shell, and the...

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

    Jul 20, 2023 · Group 18 elements (helium, neon, and argon are shown in Figure 2) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration. Elements in other groups have partially filled valence shells and gain or lose electrons to achieve a stable electron configuration. An atom may give, take, or share electrons ...

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  5. chem.libretexts.org › Courses › Mendocino_College2.9: Valence Electrons - Chemistry LibreTexts

    Jul 20, 2022 · Valence shell electrons (or, more simply, the valence electrons) are the electrons in the highest-numbered shell, or valence shell, while core electrons are the electrons in lower-numbered shells. We can see from the electron configuration of a carbon atom—1 s 2 2 s 2 2 p 2 —that it has 4 valence electrons (2 s 2 2 p 2 ) and 2 core ...

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

    Valence shell. The valence shell is the set of orbitals which are energetically accessible for accepting electrons to form chemical bonds. For main-group elements, the valence shell consists of the ns and np orbitals in the outermost electron shell.

  7. chem.libretexts.org › Courses › Williams_School3.1: Valence Electrons - Chemistry LibreTexts

    Aug 20, 2021 · Valence electrons are the outer-shell electrons of an atom. Valence electrons determine the reactivity of an atom. Atoms have a tendency to have eight electrons in their valence shell. The attraction of oppositely charged ions is what makes ionic bonds.

  8. sciencenotes.org › what-are-valence-electronsWhat Are Valence Electrons? Definition and Periodic Table

    Mar 3, 2021 · Valence electrons are outer shell electrons for main group elements. For the transition metals with partially-filed d shells, valence electrons are those electrons outside the noble gas core. The number of valence electrons indicates the maximum number of chemical bonds an atom can form.

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