2.  Variable hardness, malleable rather the brittle  Variable melting and boiling points, dependent on number of valence electrons, normally high

3.  Good electrical and thermal conductivity  Insoluble, except in other metals  Examples ?

4.  Hard, but brittle  High melting points, normally over 500°C  Conduct when molten or in solution, but not as solids  More soluble in water than other solvents  Examples ?

5.  Very hard, but brittle  Very high melting points, over 1000°C  Do not conduct in any state, except ?  Insoluble in all solvents

6.  Usually soft and malleable (unless H- bonding)  Lowish melting points. Often liquids or gases at stp  Do not conduct  More soluble in non- aqueous solvents  Examples ?