Atomicity


 
 
Concept Explanation
 

Atomicity

Atomicity: It is defined as the number of atoms present in a molecule. On the basis of atomicity, molecules can be classified as:

  • Monoatomic molecules: They consist of only one atom. E.g. He,Ne,Ar,Xe,Fe, Al ::etc..
  • Diatomic molecules: They consist of two atoms. E.g.H_2,O_2,N_2::etc.
  • Triatomic molecules: They consist of three atoms. E.g.O_3,CO_2, NO_2::etc.
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    Sample Questions
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    Question : 1

    Which of the following statement/statements are correct :

    (a) He and H2 are the monoatomic molecules.

    (b) O2 and O3 are the polyatomic molecules.

    (c) P4 and H2O2 are tetraatomic molecules.

    (d) N2 and H2 are diatomic molecules.

    Right Option : C
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    Question : 2

    _____________________ molecules consist of three atoms.

    Right Option : C
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    Question : 3

    Which of the following atom is a monoatomic molecule ?

    Right Option : D
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