Chemistry Chapter 1 Class 10: Atomic Number and Chemical Changes
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Questions and Answers

What does the term 'valency' of an element represent?

  • The combining capacity of an element (correct)
  • The density of the element
  • The number of protons in the nucleus
  • The number of neutrons in the nucleus

    • Which of the following is a characteristic of a chemical change?

  • Change in color or odor (correct)
  • No new substance formed
  • Change in state of matter
  • Change in shape or size

    • What is the atomic number of an element?

  • The number of electrons in the nucleus
  • The sum of protons and neutrons in the nucleus
  • The number of electrons in the outermost shell
  • The number of protons in the nucleus (correct)

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