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      Question

      Which of the following is a

      non-metal?
      A Nitrogen Correct Answer Incorrect Answer
      B Aluminium Correct Answer Incorrect Answer
      C Iron Correct Answer Incorrect Answer
      D Zinc Correct Answer Incorrect Answer

      Solution

      • Nitrogen (Atomic number -7, Group 15 of the periodic table): • Elemental nitrogen is a colourless, odourless, tasteless and mostly inert diatomic gas at standard conditions. • Nitrogen constitutes 78% by volume of Earth's atmosphere. • Nitrogen occurs in all living organisms. • The non-metals include carbon (C), nitrogen (N), oxygen (O), phosphorus (P), sulfur (S), selenium (Se).

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