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Thread: What is covalent bond?

  1. #1 What is covalent bond? 
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    what is covalent bond?


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    Bullshit Intolerant PhDemon's Avatar
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    A shared pair of electrons between atoms, one electron coming from each atom.


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  4. #3  
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    Quote Originally Posted by Indranil View Post
    what is covalent bond?
    A bond between atoms formed by them sharing electrons between them, predominantly along the direction between them. Covalent bonding can be contrasted with two other types of bonding: ionic bonding, in which atoms lose or gain electrons to form positive and negative ions, which are attracted to one another, and metallic bonding, in which some electrons become detached from their parent atoms to form a negatively charged matrix, in which positive metal ions are embedded. One distinguishing feature of the covalent bond, compared to these other two types, is that it is directional, while the others are not. Covalent bonds point in particular directions from the atom. Covalent bonds are also required for the formation of molecules.
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    Thank you all.
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    Forum Professor Daecon's Avatar
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    Where does the word covalent come from?
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    Ultimately it is from Latin, Valence (=strength or capacity), i.e the capacity to form bonds, the co- bit comes from the fact the electrons are shared between atoms to form the bond.
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    Forum Professor Daecon's Avatar
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    Ah right, I was thinking it was from a similar root to "covenant", but then I thought it would be spelled with an "e" not an "a".
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  10. #9  
    KJW
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    Quote Originally Posted by PhDemon View Post
    one electron coming from each atom.
    This is not necessarily true. For example, in the covalent bond between a Lewis acid and a Lewis base, the Lewis base supplies both electrons. However, in determining the formal charges of the atoms, each of the two atoms bonded by a single covalent bond is assumed to have one of the pair of electrons╣.

    ╣ There are bond types other than 2-centre 2-electron bonds.
    There are no paradoxes in relativity, just people's misunderstandings of it.
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  11. #10  
    Bullshit Intolerant PhDemon's Avatar
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    True, I pitched the answer at the level I thought the OP was at...
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