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Question

Name two elements that exist in the form of atoms.


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Solution

  • Group 18 elements are inert gas i.e., It does not react with other elements in normal conditions.
  • They are stable and hence monoatomic i.e., having only one atom in the free state as gases.
  • Argon(Ar) is a member of group 18 having the atomic number 18.
  • Neon(Ne) is a member of group 18 having the atomic number 10.
  • Atom- It is the smallest constituent unit of matter that possess the properties of the chemical element.
  • Atoms don’t exist independently.
  • Molecules- Molecules are made up of groups of atoms having independent existence.

Hence, Argon and Krypton are the two examples of gases in which the smallest particle is an atom.


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