1.4 Structure and Bonding Flashcards
Name the 3 different Intramolecular Bonds
Covalent
Ionic
Metallic
What kind of bond is formed when there is no difference in electronegativity?
Non Polar
Name the 3 different Intermolecular Bonds
London Dispersion Forces (LDFs)
Permanent dipole - permanent dipole (PD-PD)
Hydrogen
What are LDFs?
They are the attraction between temporary dipoles
What are PD-PDs?
They are the attraction between permanent dipoles
What are Hydrogen Bonds?
They are the attraction between permanent dipoles where H is bonded to either N/O/F
Where do you find LDFs?
They are in everything that has electrons
Where do you find PD-PDs?
In polar molecules
Where do you find Hydrogen Bonds?
In polar molecules (H-N/O/F)
How do LDFs arise?
They are formed due to the uneven movement of molecules
How to PD-PDs arise?
The form due to a difference in electronegativity values
How do Hydrogen Bonds arise?
they form due to a big difference in electronegativity values
What is Viscosity?
How easily a substance flows
What can be used to describe solubility?
Like dissolves like
What is a molecule if it is symmetrical?
Non Polar
What is a molecule if it is unsymmestrical?
Polar
What are the Metallic elements? (out of 1st 20)
Lithium, Beryllium, Sodium, Magnesium, Aluminium, Potassium, Calcium
Describe the features of Metallic Elements
They have a higher melting point and boiling point
They are conductors of electricity
What are the Monatomic elements? (out of 1st 20)
Helium, Neon, Argon
Describe the features of Monatomic elements
They have lower melting point and boiling point
They are non conductors of electricity
What are the Covalent Molecular elements? (out of the 1st 20)
Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine.
Also phosphorus and sulphur and fullerenes
Describe the features of the Covalent Molecular elements
They have lower melting point and boiling point
They are non conductors of electricity
What forms are Phosphorus, Sulphur and Fullerenes found in?
Phosphorus - P4
Sulphur - S8
Fullerenes - C60
What are the Covalent Network elements? (out of the 1st 20)
Boron, Carbon, Silicon
Describe the features of the Covalent network elements
High melting point and boiling point
Non conductors of electricity
