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Why Do Elements in the Same Group Have Similar Valence Electrons?

Elements that are in the same group of the periodic table have similar outer electrons. This happens for a few reasons:

  • Electron Arrangement: Elements in the same group have the same arrangement of outer electrons.

  • Count of Valence Electrons: Here are some examples:

    • Group 1 (Alkali Metals) has 1 outer electron. For instance, Lithium (Li) has 1 outer electron.
    • Group 2 (Alkaline Earth Metals) has 2 outer electrons. For example, Beryllium (Be) has 2 outer electrons.
    • Group 17 (Halogens) has 7 outer electrons. For example, Fluorine (F) has 7 outer electrons.

  • Reactivity: Having similar outer electrons means these elements behave in similar ways and have similar chemical reactions within their group.

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Why Do Elements in the Same Group Have Similar Valence Electrons?

Elements that are in the same group of the periodic table have similar outer electrons. This happens for a few reasons:

  • Electron Arrangement: Elements in the same group have the same arrangement of outer electrons.

  • Count of Valence Electrons: Here are some examples:

    • Group 1 (Alkali Metals) has 1 outer electron. For instance, Lithium (Li) has 1 outer electron.
    • Group 2 (Alkaline Earth Metals) has 2 outer electrons. For example, Beryllium (Be) has 2 outer electrons.
    • Group 17 (Halogens) has 7 outer electrons. For example, Fluorine (F) has 7 outer electrons.

  • Reactivity: Having similar outer electrons means these elements behave in similar ways and have similar chemical reactions within their group.

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