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Chapter 06
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26
Chemistry
10th Grade
04/30/2009

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Term
Chemical Bond
Definition
is a mutual electrical attraction between the nuclei and valence electrons of different atoms that bnds the atoms together.
Term
Ionic Bonding
Definition
chemical bonding that results from the electrical attraction between cations and anions
Term
Covalent Bonding
Definition
results from the sharing of electron pairs between two atoms
Term
Non-Polar Covalent Bond
Definition
a covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge.
Term
Polar
Definition
they have an uneven distribution of charge
Term
Polar-Covalent Bond
Definition
is a covalent bond in which the bonded atoms have an unequal attraction for the shared electrons
Term
Molecular Compound
Definition
a chemical compound whose simplest units are molecules
Term
Chemical Formula
Definition
indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts.
Term
Molecular Formula
Definition
shows the types and numbers of atoms combined in a single molecule of a molecular compound
Term
Bond Energy
Definition
is the energy required to break a chemical bond and form neutral isolated atoms
Term
Electron-Dot Notation
Definition
is an electron-configuration notation in which only the valence electrons of an atom of a particular element are shown, indicated by dots placed around the elments symbol
Term
Lewis Structures
Definition
formulas in which atomic symbols represent nuclei and inner-shell electrons, dot pairs or dashes between two atomic symbols represent electron pairs in covalent bonds, and dots adjacent to only one atomic symbol represent unshared electrons.
Term
Structural Formula
Definition
indicates the kind, number, arrangement, and bonds but not the unshared pairs of the atoms in a molecule
Term
Single Bond
Definition
is a covalent bond in which one pair of electrons is shared between two atoms
Term
Multiple Bonds
Definition
Double and triple bonds
Term
Resonance
Definition
refers to bonding in molecules or ions that cannot be correctly representee by a single Lewis Structure
Term
Ionic Compound
Definition
is composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal
Term
Formula Unit
Definition
is the simplest collection of atoms from which an iconic compound's formula can be established.
Term
Lattice Energy
Definition
is the energy released when one mole of an ionic crystalline compound is formed from gaseous ions
Term
Metallic Bonding
Definition
the chemical bonding that results from the attraction between metal atoms and the surrounding sea of electrons
Term
VSEPR Theory
Definition
states that repulsion between thhe sets of valence-level electrons surrounding an atom causes these sets to be oriented as far apart as possible
Term
Hybridization
Definition
is the mixing of two or more atomic orbitals of similar energies on the same atom to produce new hybrid atomic orbitals of equal energy
Term
Hybrid Orbitals
Definition
are orbitals of equal energy produced by the combination of two or more orbitals on the same atom
Term
Dipole
Definition
is created by equal but opposite charges that are seperated by a short distance
Term
Hydrogen Bonding
Definition
the intermolcular force in which a hydrogen atom that is bonded to a highly electronegative atom is attractred to an unshared pair of electrons of an electronegative atom in a nearby molecule
Term
London Dispersion Forces
Definition
the intermolecular attractions resulting from the constant motion of electrons and the creation of instantaneous dipoles
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