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Element that is also a molecule?

  1. Jan 10, 2005 #1
    What would be an example of an element that is also a molecule?

    Would hydrogen be an example of this?
     
  2. jcsd
  3. Jan 10, 2005 #2
    Very few elements actually exist as single atoms. A molecule is the smallest part of an element, or compound, that can exist independently e.g. hydrogen exists on its own as H2, oxygen as O2.
     
  4. Jan 11, 2005 #3

    dextercioby

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    I would say very many elements exista as monoatomic molecules.All the metals,for example.Don't get confused by the fact that if metals have a crystaline structure,then the molecules would be composed by more than one atoms...

    Daniel.
     
  5. Jan 11, 2005 #4
    An Element Is A Single Atom. While A Molecule Is A Group Of Atoms That Are Bond Together To Form Another Compounds... Some Elements Exist As A Diatomic Atom. Example Of These Are Hydrogen And The Halogens Family( Chlorine. Fluorine Etc.) In Case Of Hydrogen. Hydrogen Is A Diatomic Atom. If The Hydrogen Bonded To Other Elements This Is An Example Of Molecule...
    In Short Element Is A Single Atom While Molecule Composed Of 2 Or More Atoms That Are Bonded Together.
     
  6. Jan 11, 2005 #5

    Gokul43201

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    Just so this does not cause any confusion, I'm going to make corrections to oxygen's post.
    No, an element is any material that is composed of only a single kind of atom (ie: all its atoms are identical)

    A molecule is a group of atoms that are bonded together, but they do not form a compound. A compound is is something whose molecules contain more than one kind of atom.

    Some elements are a collection of diatomic molecules. You can not have a diatomic atom - that's self-contradictory.

    Hydrogen is made up of diatomic molecules. If hydrogen bonds with atoms of another element you get a compound.

    You can not compare an element and a molecule. You can compare an element and a compound. An element is made of only a single kind of atom - whether as a crystal (Fe), or isolated atoms (He) or as molecules (H2), does not matter. A compound is made up of molecules (or crystals) with more than one kind of atom (NH3, H2O, NaCl)
     
  7. Jan 11, 2005 #6

    Gokul43201

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    To answer the original question :

    It would make more sense to ask, "for an example of an element that exists as molecules" or "that is composed of molecules".

    Yes, hydrogen, is such an element. Nitrogen, oxygen, chlorine, fluorine, bromine and iodine are the only others at STP.
     
  8. Jan 12, 2005 #7

    ShawnD

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    If I'm not mistaken, only noble gases can be 1-atom molecules.
     
  9. Jan 12, 2005 #8

    dextercioby

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    What happened to the metals/semimetals??Got banned from existence in the periodic table?? :wink:

    Daniel.
     
  10. Jan 12, 2005 #9

    ShawnD

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    Metals are hundreds/thousands of atoms bound together in a lattice.
     
  11. Jan 12, 2005 #10

    dextercioby

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    And that's just because chemists wrongy assume interactions between metals in a crystaline structure as chemical bonds,right??I bet they have no idea about solid state PHYSICS... :rolleyes:

    Daniel.
     
  12. Jan 12, 2005 #11

    ShawnD

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    Compare non-metal crystals with metal crystals. Here is what iodine looks like as a crystal. Here's what sodium looks like as a crystal. The iodine hangs out in packs of 2 wheras each sodium binds to 8 of its closest neighbors. The only reason you can't call it Na9 is because you can't distinguish the atoms as groups of 9. Every atom is bound to 8 other atoms.

    If 10 people are holding hands in a cirle, I can't say that each person is not holding hands. Even though each person is holding the hand of 2 others, I can't say the people are in groups of 3 either.
     
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