Based on your description, it seems you're referring to a diagram involving metal ions and electrons. Without seeing the diagram, I can provide some general guidance:
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Metallic Bonds are characterized by a sea of delocalized electrons surrounding metal ions, allowing for conductivity and malleability. If the diagram shows a collection of metal ions and a sea of electrons, it represents metallic bonds.
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Ionic Bonds typically involve the transfer of electrons from one atom to another, forming charged ions that attract each other.
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Covalent Bonds involve the sharing of electrons between atoms.
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Hydrogen Bonds are a specific type of weak attraction between a hydrogen atom covalently bonded to a highly electronegative atom and another electronegative atom.
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Metal Ions and Electrons suggest metallic bonds if it shows delocalized electrons.
If the diagram prominently features metal ions surrounded by free-moving electrons, the answer would likely be metallic bonds.