Bonding Flashcards
What is the difference between a physical or chemical change
Physical- usually reversible
Chemical- permanent and always produces something new
Signs of a chemical reaction
Energy change
Colour change
Precipitate- insoluble solid formed
Effervescence
Factors that affect rate of reaction
Surface area/particle size
Temperature
Concentration
Catalyst
What is an isotope
Isotopes are atoms with the same atomic number, different mass number
What does metallic bonding
Metal elements
What is the deformation of metallic bonding
Electronstatic attraction between positive metal ions and a sea of delocalised electrons
Definition of covalent bonding
Electrostatic attraction between the shared pair of electrons and the positive nuclei on either side
What does covalent bonding
Diatomic elements and compounds
What is the difference between covalent molecules and networks
Covalent- small, definite number of atoms
Network- large, many covalent bonds
What is the definition of ionic bonding
The electrostatic attraction between positive (metal) ions and negative (non-metal) ions caused by transfer of electrons
What would be its ion
23
Na
11 2,8,1
23 +
Na
7
2,8
What would be its ion
14
N
7
2,5
14 3-
N
7
2,8
What does solubility tell you about bonding
Ionic- dissolves in water e.g. sodium chloride
Covalent- dissolve in organic solvent e.g. wax
What does melting points tell you about bonding
Low- weak forces (covalent molecules)
High- strong bonds ( ionic, metallic, covalent networks)
What does conductivity tell you about bonding
Metallic conducts
Covalent doesn’t
Ionic will if dissolved or molten
