The nonmetal elements occupy the upper right-hand corner of the periodic table. These elements have similar chemical properties that differ from the elements considered metals.
The nonmetal element group is a subset of these elements. The nonmetal element group consists of hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur and selenium.
Hydrogen acts as a nonmetal at normal temperatures and pressure and is generally accepted to be part of the nonmetal group.
Properties of nonmetals include:
- dull, not shiny
- poor conductor of heat
- poor conductor of electricity
- high ionization energies
- high electronegativity
- not malleable or ductile, usually brittle
- lower density (when compared to metals)
- lower melting point and boiling points (when compared to metals)
- gains electrons in reactions
This is a list of the nonmetal elements in order of increasing atomic number.