Question
Among the following options, which one is a non-metallic
element?Solution
Non-metals are elements that generally have low melting and boiling points, are poor conductors of heat and electricity, and tend to form negatively charged ions (anions) when they react with metals. Chlorine is a non-metal, and is a member of the halogen group of elements. Sodium, iron, and calcium are all metals, with sodium and calcium being in the alkali metal and alkaline earth metal groups respectively, and iron being a transition metal.
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