Chemistry, 10.07.2019 08:00 amaraea

Which element is classified as a noble gas? o n cl xe

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Answer from: javibote

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: 1s^22^22p^4

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: 1s^22^22p^3

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: 1s^22^22p^63s^23p^5

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: $[Kr]5s^24d^{10}5p^6$

As, this is a stable electronic configuration. Thus, it is considered as a noble gas.

Hence, the correct answer is Xenon (Xe).

Answer from: fowers8376

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 : [O]=1s^22^22p^4

Nitrogen has atomic number of 7. Its electronic configuration is : [N]=1s^22^22p^3

Chlorine has atomic number of 17. Its electronic configuration is : [Cl]=1s^22^22p^63s^23p^5

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 : $[Xe]=[Kr]5s^24d^{10}5p^6$

As, this is a fully filled and stable electronic configuration. Thus, it is considered as a noble gas.

Answer from: Quest

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Answer from: Quest

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