CBSE  /  Class 10  /  Science  /  Periodic Classification of Elements

  • 1. 
    Which type of elements are poor conductors of heat and electricity?

  • Metals
  • Non-metals
  • Gases
  • None of these

  • 2. 
    What is the symbol of the element Tungsten?

  • Tu
  • W
  • Ta
  • Tw

  • 3. 
    Which of the element whose atomic number is given below cannot accommodate in the present set up of the long form of the periodic table?

  • 107
  • 118
  • 102
  • 126
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