Simple molecular substances (Covalent compounds) Flashcards
1
Q
What is a simple molecular substance?
A
A simple molecular substance is a few atoms held together with covalent bonds.
2
Q
Name the 7 main simple molecules
A
Hydrogen
Chlorine
Hydrogen chloride
Nitrogen
Ammonia
Methane
Water
3
Q
2 properties of simple covalent molecules
A
Melting and boiling point
Electrical conductivity
4
Q
Melting and boiling points
A
Simple molecular substances have low Melting and boiling points.
This is because although the covalent bond between the atoms is strong, the intermolecular forces of attraction between the molecules are very weak, so less energy is needed to overcome the bonds.
5
Q
Electrical conductivity
A
They cannot conduct electricity because there are no free electrons or ions to move around and carry a charge.
