Question

Which of the following statement is incorrect?

• A. Electron affinity of nitrogen and noble gases is zero
• B. Cesium is the most electropositive element; while fluorine is the most electronegative element
• C. Chlorine has the highest electron affinity among all the elements of periodic table
• D. In any period, the atomic radius the noble gas is lowest

Answer 1

Answer: (D)

Atomic radius of helium is greater than H. Similarly, atomic radius of neon is greater than that of fluorine. This is because interelectronic repulsion in fully-filled shells outweighs the effect of increased effective nuclear charge. Rest statements are correct.