14.2-14.3

Metallic bonding

unique because valence electrons are shared by all the atoms in the metal

Molecular formula

Tell us how many of each type of atoms are in a molecule

Structural formula

Shows the general arrangement of the atoms in a molecule

Empirical formula

Shows only the simplest ratio of atoms in a compound

Intermolecular forces

Properties, such as a melting point boiling point and solubility are caused by —?—;

Dipole- dipole forces

Are present only between polar molecules

London force

An intermolecular force that occurs between all molecules, whether polar or nonpolar

London Forces

The only intermolecular force that affect nonpolar molecules

Hydrogen bond

Unusually strong, intermolecular force present when hydrogen Covalently bonds to a highly electronegative atom

Intermolecular forces

also called the glue that holds many solid objects together

Hydrogen bond

Are much stronger than any other intermolecular forces

Unit cell

Each repeating unit is a crystalline solid called—??—

Vapor pressure and molecular mass

The -?-?- and boiling point of a molecular substance depend primarily on the -?-?- of the molecules and the types of intermolecular forces between them