Chlorine would be an example of a non metallic element.
elements
Nitrogen is a nonmetal.
For example metal or nonmetal character, radioactivty, atomic weight, reactivity.
The most reactive nonmetal is fluorine
Nonmetal elements such as sulfur and nonmetal oxides like carbon dioxide form acidic oxides.
element that is not metal
H2O is neither a metal nor a nonmetal. It is a compound consisting of two nonmetal elements, hydrogen and oxygen.
SO3 is a compound and therefore is neither a metal nor a nonmetal, because these are types of chemical elements, not of compounds. This particular compound consists of two nonmetal elements, sulfur and oxygen.
One example is sodium (metal) and chlorine (nonmetal). Sodium can lose an electron to form a sodium ion (Na+), while chlorine can gain an electron to form a chloride ion (Cl-). These ions then combine to form the ionic compound sodium chloride (NaCl).
The terms "metal" and "nonmetal" are normally applied to elements, not compounds such as silver bromide.
The halogens.
Carbon is a nonmetal. Thus this is a nonmetal oxide.