Chapter 4: Chemical Bonding and Molecular Geometry

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15 Terms

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Ionic bonding

attraction between the opposite charges of a cation and an anion, complete transfer of electrons

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Lattice energy

the energy required to completely separate a mole of a solid ionic compound into its gaseous ions

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Coulomb’s Law

force between to particles based on their charge and size

F= k(Q1Q2/r2)

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Covalent bond

bond in which two electrons are shared by two atoms

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Bond enthalpy

change in enthalpy required to break a bond

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Covalent compounds

relatively weak intermolecular forces, liquid, gases, low melting solids

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Ionic compounds

stronger forces, solids with high melting points

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Non-polar covalent bonds

electrons shared equally

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Polar covalent bonds

electrons not shared equally, one atom pulls more

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Electronegativity (EN)

the ability of an atom to attract electrons to itself (determines whether something is polar or non-polar)

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Bond polarity

small EN difference = non-polar covalent

mid EN difference = polar covalent 

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Naming binary molecules

2 non-metal elements in the formula, 2nd element gets “ide” ending, greek prefixes indicate number of atoms

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Naming acids

  1. anions ending in “ide” get hydro prefix, “ic” ending and add “acid” to name

  2. anions ending in “ate” get “ic”, ending in “ite” get “ous” ending

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Naming hydrates

greek prefixes to indicated number of water molecules

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Octet rule

atoms, other than hydrogen, tend to form bonds until surrounded by 8 electrons (have a full octet)