CBSE Class 9 Science Question 16 of 34

Structure of the Atom — Question 16

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16
Question

Question 16

Isotopes of an element have

  1. The same physical properties
  2. Different chemical properties
  3. Different number of neutrons
  4. Different atomic numbers
Answer

Different number of neutrons

Reason — Isotopes of an element have same atomic number (i.e., number of protons) and different mass number (i.e., sum of protons + neutrons).