Chemical Bonds

Chemical bonds:
+ Ionic bond
+ Covalent bond
+ Coordinate/ dative bond
+ Intermolecular bond
Sigma bond: orbitals overlap
Pi bond: orbitals sideway
Covalent bond:
Definition: 2 non-metallic shared electrons
Types: Polar, non-polar
Strength:
+ depends on bond energy and length of bond
+ bond energy = energy to break the bond. Càng lớn->lket càng mạnh
+ length of bond -> càng dài càng yếu, càng ngắn càng mạnh
Properties of covalent compounds:
+ No conductivity
+ Volatile
+ Gaseous or liquid
+ Low melting point
+ Usually insoluble
+ Số cacbon tăng, solubility giảm
Coordinate/dative bond
Definition: lone pair of electrons + empty orbital
Ex: H+ + NH3 -> NH4+ (+ belongs to Hidrogen)
H+: empty orbital
NH3: has lone pair of electrons in nitrogen