Carbon, sulphur, and phosphorus, for example, are solid at normal temperatures. They are usually gasses, although they can also be liquids. They are excellent heat and electricity insulators. Non-metals are materials that lack all of the characteristics of metals. They often have 4, 5, 6, or 7 electrons in their outermost shell. Non-metals are elements that accept or gain electrons to generate negative ions.
METALS PERIODIC TABLE PDF
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