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Understanding Chemical Bonds: Forces that Hold Atoms Together

Learn about the different types of chemical bonds - ionic, covalent, and metallic bonds - that determine how atoms are held together in molecules. Explore the transfer and sharing of valence electrons and understand the electrostatic forces at play in chemical bonding.

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Understanding Chemical Bonds: Forces that Hold Atoms Together

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  1. Orginally prepared and distributed by Jefferson Lab Office of Science Education education.jlab.org/jsat/powerpoint/chembond.ppt

  2. Chemical Bondforce that holds two atoms together

  3. IONIC BONDvalence electrons are transferred between a metal and a non-metal forming positively and negatively charged particleselectrostatic attractive force

  4. COVALENT BONDvalence electrons are shared between two atoms

  5. Covalent Bonds

  6. METALLIC BONDelectrons are shared among many atoms of the same metal element

  7. Metallic Bond • Formed among atoms of the same metal element • Non-localized, “sea of electrons” • Good conductors, lustrous, malleable, high melting points • Examples: Na, Fe, Al, Au, Co

  8. MetallicBond, A Sea of Electrons

  9. Metals Form Alloys Metals do not bond with other metals. They form alloys – physical, homogenous solution of metals Examples: steel, brass, bronze and pewter

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