To which of the following atom, the attachment of electron is most difficult? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Step 1: Analyze the electronic configurations: Radon is a noble gas with a highly stable closed shell. Nitrogen has a stable, half-filled p^3 shell. Radium is an alkaline earth metal with an s^2 shell. Step 2: Noble gases already have extremely stable octets. Adding an electron requires placing it in a higher principal quantum shell, which is highly energetically unfavorable. Step 3: Therefore, the attachment of an electron is most difficult for the noble gas Radon (option a).