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Question 4: An element x has several isotopes. What do these isotopes have in common? How do they differ?


Atoms of a certain element having the same atomic number and different mass numbers are called isotopes. In fact, they are the nuclei of the same element that differ in the number of neutrons.

They have in common

  1. All isotopes of an element have the same number of protons and electrons and occupy the same place in the periodic table.
  2. All isotopes of an element have the same chemical properties. They react the same way in all chemical reactions.

They differ in

  1. Isotopes of an element have different number of neutrons.
  2. They differ in their physical properties.


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