Answer: The correct answer is Xenon (Xe).
Explanation:
Noble gases are defined as the gases which have fully filled electronic configuration or stable electronic configuration.
From the given options:
Option 1: Oxygen (O)
The atomic number of this element is 8.
Electronic configuration of this element: [tex]1s^22^22p^4[/tex]
As, this is not the stable electronic configuration. Thus, it is not considered as a noble gas.
Option 2: Nitrogen (N)
The atomic number of this element is 7.
Electronic configuration of this element: [tex]1s^22^22p^3[/tex]
As, this is not the stable electronic configuration. Thus, it is not considered as a noble gas.
Option 3: Chlorine (Cl)
The atomic number of this element is 17.
Electronic configuration of this element: [tex]1s^22^22p^63s^23p^5[/tex]
As, this is not the stable electronic configuration. Thus, it is not considered as a noble gas.
Option 4: Xenon (Xe)
The atomic number of this element is 54.
Electronic configuration of this element: [tex][Kr]5s^24d^{10}5p^6[/tex]
As, this is a stable electronic configuration. Thus, it is considered as a noble gas.
Hence, the correct answer is Xenon (Xe).
Answer:
Xenon (Xe) element is classified as a noble gas.
Explanation:
Noble gas are mono-atomic species with fully filled electronic configuration and are inert in nature.
Oxygen has atomic number of 8. Its electronic configuration is : [tex][O]=1s^22^22p^4[/tex]
Nitrogen has atomic number of 7. Its electronic configuration is : [tex][N]=1s^22^22p^3[/tex]
Chlorine has atomic number of 17. Its electronic configuration is : [tex][Cl]=1s^22^22p^63s^23p^5[/tex]
All the above electronic configuration are not fully-filled.Hence they are not noble gases.They exist in diatomic form.
Xenon has atomic number of 54. Its electronic configuration is : [tex][Xe]=[Kr]5s^24d^{10}5p^6[/tex]
As, this is a fully filled and stable electronic configuration. Thus, it is considered as a noble gas.
