AS Chemistry bonding

why do chemical bonds form?

when does ionic bonding occur?

what is ionic bonding?

what are the properties of ionically bonded compounds?

Why are ionic compounds brittle?

What is a covalent bond?

how does a covalent bond work?

What is a double covalent bond?

what are the properties of substances with a molecular structure?

what is co-ordinate bonding?

how is co-ordinate bonding represented on a diagram?

What is meant by the term electronegativity?

What does electronegativity depend on?

what are the trends in electronegativity?

what is the bond property known as polarity?

What is the polarity of a covalent bond between two atoms that are the same?

What is the effect of electronegativity on polarity?

what is a metallic bond?

What does the strength of metallic bonds depend on?

what are the properties of metals.

what are the three types of intermolecular force?

how do dipole- dipole forces arise?

how do Van der Walls forces arise?

how do Van der Waals forces effect boiling temperatures?

what is needed for hydrogen bonds occur?

why do NH3 h20 and HF have higher boiling points than expected?

what are the energy changes occur when solids melt and liquids vaporise?

What energy changes occur when liquid is vapourised?