Respuesta :
Answer: Option (b) is the correct answer.
Explanation:
When elements are present in a group then it means that each element of that group contains same number of valence electrons.
Therefore, because of this they tend to show similar chemical properties.
Chlorine is a halogen atom and its atomic number is 17. Hence, its electronic distribution is 2, 8, 7. So, there are 7 valence electrons in it.
Atomic number of Cu is 29 and its electronic configuration is [tex][Ar]4s^{1}3d^{10}[/tex]. Hence, there is only one valence electron in a Cu atom.
Fluorine (F) is also an halogen atom whose atomic number is 9. Its electronic distribution is 2, 7. Hence, it also contains 7 valence electrons.
Therefore, it will show chemical properties similar to Cl atom.
Electronic configuration of Cr is [tex][Ar]4s^{1}3d^{5}[/tex]. So, there is only one valence electron present in a Cr atom.
Atomic number of sulfur (S) is 16 and its electronic distribution is 2, 8, 6. So, there are only 6 valence electrons in it.
Thus, we can conclude that out of the given options fluorine (F) element would you expect to have properties most similar to those of chlorine (Cl).
