Respuesta :
Answer: The correct answer is Option D.
Explanation:
Noble gases are defined as the gases which have stable electronic configuration and is highly nonreactive. These belong to Group 18 of the periodic table.
For the given options:
- Option A: Hydrogen (H)
The electronic configuration of hydrogen = [tex]1s^1[/tex]
This element belongs to Group 1 and is known as alkali metal.
- Option B: Barium (Ba)
The electronic configuration of barium = [tex][Xe]6s^2[/tex]
This element belongs to Group 2 and is known as alkaline earth metal.
- Option C: Nitrogen (N)
The electronic configuration of nitrogen = [tex]1s^12s^22p^3[/tex]
This element belongs to Group 15 and is known as p-block element.
- Option D: Krypton (Kr)
The electronic configuration of krypton = [tex][Ar]4s^23d^{10}4p^6[/tex]
This element belongs to Group 18 and is known as noble gas.
- Option E: Bromine (Br)
The electronic configuration of bromine = [tex][Ar]4s^23d^{10}4p^5[/tex]
This element belongs to Group 17 and is known as halogen.
Hence, from the above information, the correct answer is Option D.
