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9th Class Science Atoms and Molecules Question Bank 9th CBSE Science Atoms and Molecules

  • question_answer
      Which of the following symbols of elements are incorrect? Give their correct symbols. (a) Cobalt CO                     (b) Carbon c (c) Aluminium AL              (d) Helium He (e) Sodium SO                  [NCERT Exemplar]

    Answer:

                All are incorrect except (d) (a) Cobalt Co (Second letter is small in symbol) (b) Carbon C (First letter is capital in symbol) (c) Aluminium Al (Second letter is small in symbol) (d) Helium He (Correct symbol) (e) Sodium Na (Initial of Latin name (Natrium) is Na)


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