2.2 Simple Molecules Flashcards
How are atoms within a molecule held together?
By strong covalent bonds
Why do simple molecules have little attraction for each other?
The covalent bonds act only between the atoms in the molecule, and they have weak intermolecular forces
Why do simple molecules not carry electricity?
They don’t have an overall charge so can’t carry an electrical charge
Why do substances made of simple molecules have low melting and boiling points?
They don’t require much energy to break the intermolecular forces
Why does petrol not conduct electricity?
Petrol is made from hydrocarbons which are covalently bonded so it doesn’t have an overall charge so it can’t carry and electrical charge
Name 3 simple molecules that are gases at room temp? Why?
- h2
- O2
- CH4
Because they have very weak intermolecular forces that require almost no energy to break them as they are very small molecules
Why are larger simple molecules liquid or even solid at room temp?
They have stronger attractions as they are larger molecules
Name 2 forces acting on simple molecules to hold them together
- strong covalent bonds hold the atoms together
* weak intermolecular forces hold the molecules together
Which are stronger, electrostatic forces or covalent bonds?
Covalent bonds are the strongest type of bonds
