Question

Arrange the following in the order of conductivity: Na, Ag, Fe, Cu

• A. Ag > Cu > Fe > Na
• B. Na > Cu > Ag > Fe
• C. Fe > Ag > Na > Cu
• D. Cu > Na > Fe > Ag

Hint:

The conductivity of metals increases as you move from alkali metals (like sodium) to transition metals (like copper and silver). Transition metals generally have more free electrons, leading to higher conductivity.

Answer 1

The Correct Option is A

The conductivity of a metal depends on the number of free electrons available and the nature of the bonding. Conductivity generally increases with the number of free electrons and atomic structure. Based on their conductivity: - Silver (Ag) is the best conductor of electricity because it has the highest number of free electrons. - Copper (Cu) also has high conductivity, but slightly lower than silver. - Iron (Fe) has relatively fewer free electrons, so its conductivity is lower than copper and silver. - Sodium (Na), being an alkali metal, is a good conductor but not as good as the transition metals like copper and silver. Thus, the order of conductivity is Ag > Cu > Fe > Na.