Question

Which of the following statement is incorrect about the periodic trend?

• A. Atomic radii decrease while going from left to right in a period and increase with atomic number in a group.
• B. Ionisation enthalpies generally decrease across a period and increase down a group.
• C. Electronegativity generally increases across a period and decreases down a group.
• D. Electron gain enthalpies in general, become more negative across a period and less negative down a group.
• E. Among representative elements, the valence is equal to the number of electrons in the outermost orbital.

Hint:

Chemistry Tip: Stronger nuclear attraction across a period makes electron removal harder, so ionization enthalpy rises.

Answer 1

The Correct Option is B