Final answer:
The electron configuration of Cl- is indeed the same as that for argon (Ar), which makes the statement true.
The write answer is A. True.
Step-by-step explanation:
The statement that the electron configuration of Cl- is the same as that for Ar is true. A chlorine atom (Cl) has 17 electrons in its neutral state and the electron configuration is [Ne]3s²3p⁵.
When a chlorine atom gains an extra electron to become a Cl- anion, it has 18 electrons, which is equal in number to the noble gas argon (Ar). Therefore, the electron configuration for Cl- is [Ne]3s²3p⁶, which is the same as the noble gas electron configuration of argon.
The write answer is A. True.