question_answer

      Consider the following statements with reference to the periodic table of chemical elements: [IAS Prelim]

1. Ionisation potential gradually decreases along a period

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

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

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

A) 1 only                   

B)        2 only

C) 1 and 3           

D)        2 and 3