Fluorine has 7 valence electrons. Hydrogen has 1 valence electron.
Fluorine shares its 7 valence electrons with Hydrogen and Hydrogen shares its 1 valence electron with Fluorine. This is because Hydrogen wants to fill its shell to 2 electrons and Fluorine wants to fill its shell to 8 electrons.
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:F- -H ---> :F-H
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Note: the asterisks indicate electrons, there's just not a button that works better
Fluorine shares its 7 valence electrons with Hydrogen and Hydrogen shares its 1 valence electron with Fluorine. This is because Hydrogen wants to fill its shell to 2 electrons and Fluorine wants to fill its shell to 8 electrons.
.. ..
:F- -H ---> :F-H
** **
Note: the asterisks indicate electrons, there's just not a button that works better
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Separately they form covalent bonds to each other -- H2 and F2.
Together they are NOT a covalent bond, because their electronegativies differ so extremely much (f=4, h=2.1). Difference of over 1.5 means a polar bond, NOT covalent.
Covalent bonds have electronegativity differences of less than 0.5.
Together they are NOT a covalent bond, because their electronegativies differ so extremely much (f=4, h=2.1). Difference of over 1.5 means a polar bond, NOT covalent.
Covalent bonds have electronegativity differences of less than 0.5.