Which two elements have the same number of valence electrons?

Question:- Which two elements have the same number of valence electrons?

Answer: The correct options are Fluorine (F) and Chlorine (Cl).

The outermost shell or energy level of any atom which contains only a few electrons is known as the valence electron. These electrons work as chemical entities and are responsible for chemical interaction that defines the characteristics of chemical elements.

Fluorine and chlorine are elements of the halogen group of the periodic table or elements, which are in the same group as iodine and bromine. The atomic number of fluorine is 9, while that of chlorine is 17. At their atomic level, both elements have 7 electrons in their outer shell, hence, both are considered chemically similar.

Fluorine electronic configuration is 1S2 2S2 2P5 whereas chlorine is 1S2 2S2 2P6 3S2 3P5. In both of these elements, the outermost energy level is full and is constituted by 7 valence electrons in the 2p subshell for fluorine and 3p subshell for chlorine.