Bonding and Structure Flashcards
Types of chemical bond
covalent (molecular and network)
Ionic
Metallic
What is a covalent bond
shared pair of electrons in 2 positive nuclei
What is a non-polar (pure) covalent bond
When atoms have the SAME electronegativity
examples of pure covalent bonds
N2 I2 P4
O2 Cl2 S8
F2 Br2 C60
What is polar covalent bonding
When atoms in a bond have different electronegativity values
-PD-PD interactions (since each end has a different charge)
What are the three types of intermolecular forces
London dispersion forces
Permanent Dipole-Permanent dipole interactions
Hydrogen bonding
Where does LDF exist?
between all molecules and monatomic substances
What are LDF formed as a result of?
the electrostatic attraction between temporary dipoles and an induced dipole
When do hydrogen bonds occur
when hydrogen is bonded to very electronegative atoms
do low melting and boiling points conduct electricity?
no
Why does LDF increase if the atomic size increases
the atoms have more electrons, increasing nuclear charge
when does viscosity increase
when molecules increase in size
