UPSC CSE Prelims 2001 Q121 — Science & Technology PYQ with Answer

Consider the following statements with reference to the Periodic Table of chemical elements:

I. Ionisation potential gradually decreases along a period.

II. In a group of elements, electron affinity decreases as the atomic weight increases.

III. In a given period, electronegativity decreases as the atomic number increases.

Which of these statement(s) is/are correct?