True or False: The outer shell of an atom contains electrons that are less mobile compared to inner shell electrons.

• A. True
• B. False
• C. Can’t determine
• D. Varies by element

Answer: (B)

The outer shell of an atom contains electrons that are indeed more mobile compared to inner shell electrons. This is largely due to the fact that outer shell electrons, often referred to as valence electrons, are further from the nucleus and are less tightly bound to it. Consequently, they can participate in chemical bonding and can be more easily removed or shared in reactions, which signifies greater mobility.

In contrast, inner shell electrons are closer to the nucleus and are held more tightly due to the stronger electrostatic forces from the positively charged protons. Their primary role is to stabilize the atom rather than engage in chemical interactions. Therefore, the statement that the outer shell electrons are less mobile compared to inner shell electrons is inaccurate, making the correct answer false.