what are two characteristics that can be used to distinguish nonmetals from metal?
Metals typically have the following physical properties: a lustrous appearance, the ability to change shape without breaking, and excellent conductivity of heat and electricity. Nonmetals typically do not have these physical properties, although there are some exceptions. However it is the chemical difference that really counts. Metals tend to lose electrons to form positive ions, and nonmetals tend to gain electrons to form negative ions. 15 people found this useful.