Exam 4 Flashcards
Defined as one-half the distance between the centers of two adjacent atoms
Metallic radius
Defined as one-half the distance between the centers of the atoms in the molecules
Covalent radius
The minimum energy(kJ/mol) required to remove sn electron from a gaseous atom in its ground state
Ionization energy
The negative of the energy change that occurs when an electron is accepted by an atom in the gaseous state to form an anion
Electron affinity
X + e = X-
Electron affinity
Have the same number of electrons, and hence the same ground-state electron configuration
Ex. Na+, Al3+, F-, O2-, and N3-
Isoelectronic
The positive charge felt by an electron
Effective nuclear charge(Zeff)
The outer shell electrons of an atom. Participate in chemical bonding
Valence electrons
The electrostatic force that holds ions together in an ionic compound
Ionic bond
The energy required to completely separate one mole of a solid ionic compound into gaseous ions
Lattice energy
A chemical bond in which two or more electrons are shared by two atoms
Covalent bond
Two atoms share two pairs of electrons
Double bond
Two atoms share three pairs of electrons
Triple bond
A covalent bond with greater electron density around one of the two atoms
Polar covalent bond or polar bond
The ability of an atom to attract toward itself the electrons in a chemical bond
Electronegativity
The difference between the number of valence electrons in an isolated atom and the number of electrons assigned to that atom in a leeis structure
Formal charge
One of two or more lewis structures for a single molecule that cannot be represented accurately by only one lewis structure
Resonance structure
The enthalpy change required to break a particular bond in one mole of gaseous molecules
Bond enthalpy
The distance between identical points on successive waves
Wavelength