Which of the following is a non-metal?
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A.
Nitrogen
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B.
Aluminium
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C.
Iron
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D.
Zinc
Correct Answer:
A. Nitrogen
Explanation:
Nitrogen is the correct answer because it is a gaseous element located on the right side of the periodic table, characteristic of non-metals which are typically poor conductors of heat and electricity. In contrast, iron, zinc, and aluminium are all classified as metals due to their high conductivity, malleability, and lustrous physical properties. While metals are generally solid at room temperature and tend to lose electrons, non-metals like nitrogen often exist as gases and have high electronegativity.
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