Identical batches of the crystalline compound appeared to have wildly different melting points. Some batches, he found, melted at temperatures of around 65 degrees Celsius (149 Fahrenheit).

All ionic compounds have a high melting point and boiling ... have the same molecular formula (C 2 H 6 O) yet there is a large difference in boiling points. Ethanol (CH 3 CH 2 OH) is a liquid ...

Many non-metals have low melting and boiling points. When non-metals are in a solid state, they are usually brittle so you can’t beat them into shape. Carbon – a dull, dark grey solid and is ...