non-metals

nonmetal

[non-met-l]
noun Chemistry.
1.
an element not having the character of a metal, as carbon or nitrogen.
2.
an element incapable of forming simple positive ions in solution.

Origin:
1865–70; non- + metal

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World English Dictionary
nonmetal (nɒnˈmɛtəl)
 
n
any of a number of chemical elements that form negative ions, have acidic oxides, and are generally poor conductors of heat and electricity

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