Simple Molecular Substances and Giant Lattice Structure

What is a simple molecular substance

is made up of simple molecules- small units containing a definite number of atoms with a definite molecular formula- Ne, H₂0, H₂

Forces in a simple molecular lattice

the molecules are held in place by weak intermolecular forces

the atoms in each molecules are bonded together strongly by covalent bonds

Melting and Boiling point of simple molecular substances

low, they have weak intermolecular forces, the covalent bonds do NOT break

solubility of non polar substances in non-polar solvents

intermolecular bonds form between the molecules and solvent and the interaction weakens the intermolecular force in the simple molecular lattice

they are soluble in each other

solubility of non-polar substances in polar solvents

there is little interactions between the molecules and solvent

the interaction in a polar solvent is too strong to be broken

they are insoluble

Solubility of polar substances in polar solvents

they may dissolve as the polar solvent and substance will attract each other however the solubility depends on the strength of the dipole

electrical conductivity of simple molecular

no mobile charge particles so they can’t conduct electricity