GENERAL CHEMISTRY EXAM 4
QUESTIONS WITH CORRECT
ANSWERS
formal charge - Correct Answers -the calculated charge which may or may not be real,
the lower the numbers the more accurate the lewis dot structure.
Neutral (Periodic)
Assigned (Structure)
Formal Charge
Radicals - Correct Answers -have an odd number of electrons, highly reactive
Expanded Valence - Correct Answers -more than 8 valence electrons, occurs with
nonmetal atoms of period 3 or later because as we go down groups, size increases and
have room for extra electrons and have empty d-orbitals that can accept extra electrons.
Kasmir Fajans - Correct Answers -complicated by polarization and polarizability,
determined that ions are not hard spheres, but partially covalent.
Polarizing - Correct Answers -small, hard cations
Polarizable - Correct Answers -large, anions, easily deformed by a polarizing species
pulling on its electron density cloud.
Electronegativity - Correct Answers -do not have equal sharing of electrons, pulls
electron density, smallest atom has the highest electronegativity.
Linus Pauling - Correct Answers -american, 1932, discovered electronegativity and
defined it as the ability of an atom within a molecule to attract electron density towards
itself.
Polar Covalent - Correct Answers -in between ionic and molecular, share electrons but
not equally, results in a bond dipole
Bond Dipole - Correct Answers -a separation of charges occurs when there is a
difference in size and increase in electronegativity.
QUESTIONS WITH CORRECT
ANSWERS
formal charge - Correct Answers -the calculated charge which may or may not be real,
the lower the numbers the more accurate the lewis dot structure.
Neutral (Periodic)
Assigned (Structure)
Formal Charge
Radicals - Correct Answers -have an odd number of electrons, highly reactive
Expanded Valence - Correct Answers -more than 8 valence electrons, occurs with
nonmetal atoms of period 3 or later because as we go down groups, size increases and
have room for extra electrons and have empty d-orbitals that can accept extra electrons.
Kasmir Fajans - Correct Answers -complicated by polarization and polarizability,
determined that ions are not hard spheres, but partially covalent.
Polarizing - Correct Answers -small, hard cations
Polarizable - Correct Answers -large, anions, easily deformed by a polarizing species
pulling on its electron density cloud.
Electronegativity - Correct Answers -do not have equal sharing of electrons, pulls
electron density, smallest atom has the highest electronegativity.
Linus Pauling - Correct Answers -american, 1932, discovered electronegativity and
defined it as the ability of an atom within a molecule to attract electron density towards
itself.
Polar Covalent - Correct Answers -in between ionic and molecular, share electrons but
not equally, results in a bond dipole
Bond Dipole - Correct Answers -a separation of charges occurs when there is a
difference in size and increase in electronegativity.
