Q. Match the Column I with Column II and select the correct answer using given codes.
Column I Column II
A Inner-transition elements 1 Representative elements
B and -block elements. 2 -block
C Elements of period 3 Typical elements

 136  161 Classification of Elements and Periodicity in Properties Report Error

Solution:

The correct match is

A. -block elements contain lanthanoids and actinoids which are termed as inner-transition elements.
B. -block and -block elements are representative elements.
C. period elements are typical elements.