[Kaihachi]

Just what the title says...

[Donaldson Tan]

can you be more specific?

[Garneck]

Now explain the title  

[Kaihachi]

like the properties of a non metal what does a non metal element have that a metal doesnt..

[Donaldson Tan]

there's a good reason why elements are no longer classified as metal, non-metal or metalloids. Refer to the new ACS periodic table for more information.

[Grumples]

Its pretty much impossible to come up with a definative list of qualities that are either metallic or non-metallic (see previous posts).  However, you can make a few generalities, although there are many exceptions:

Metals: tend to conduct electricity, have high MP and BP, and oxidize (not in the rusting sense but in the red-ox sense);

Non-metals: tend not to conduct, have low MP and BP, and reduce.

Obvious caveats: graphite, a conducting non-metal; diamond, a high MP non-metal, mercury, a low MP metal, etc.