Lesson 2 Flashcards
A type of chemical bond that is formed when electrons are shared equally between two atoms.
Non-polar covalent bond
A German physicist who later worked in the United States proposed that temporary fluctuations in the electron distributions within atoms and nonpolar molecules could result in the formation of short-lived instantaneous dipole moments.
Fritz London
Attraction results from temporary dipole moments induced in ordinary nonpolar molecules.
London Dispersion Forces/Van Der Waals Forces
Present between all molecules, whether they are polar or non-polar.
London Dispersion Forces/Van Der Waals Forces
Electrons are equally distributed and constantly revolve.
Neutral atom
Weak Forces, temporary intermolecular forces.
London Dispersion Forces/Van Der Waals Forces
Attractive forces between polar molecules. The partial negative side of one molecule is attracted to the partial positive side of another molecule.
Dipole-Dipole Forces
The larger the dipole moment, the stronger the attraction.
Coulomb’s Law
The electrons are unevenly distributed because some elements are more electronegative than others.
Polar molecules
It is a polarized molecule having partially positive and negative poles.
Dipole
It is not a chemical bond. It only exists in polar covalent bonds.
Dipole-Dipole Force
It is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N‒H, O‒H, or F‒H, and an electronegative O, N, or F atom (F,O,N). This bond is particularly strong between water molecules.
Hydrogen Bond
It is not a chemical bond rather it is weaker than a covalent bond 20 times but stronger than a dipole-dipole force 10 times.
Hydrogen Bond
Attractive force that occurs between an ion and a polar molecule.
Ion-Dipole Force
It is an atom or group that holds an electrical charge.
Ion
They are the electrostatic interactions between the fixed dipole in one molecule and an ion.
Ion-Dipole Force
A ______ ion attracts the partially negative end of a neutral polar molecule.
Positive
A ______ ion attracts the partially positive end of a neutral polar molecule.
Negative
All of the terminal atoms (or groups) are the same, symmetrically arranged around the central atom, and have the same changes
Nonpolar molecule
One or more terminal atoms differ from each other. At least one polar bond is present. The terminal atoms are not symmetrically arranged. The molecule has one slightly positive end and one slightly negative end
Polar molecule
