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?

Consider the following statements with reference to the periodic tabl

1.	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
Answer» C. 1 and 3