Q. The statement that is true for the long form of the Periodic Table is
A) It reflects the sequence of filling the electrons in the order of sub-energy levels $s,\ p,\ d$ and $f$
B) It helps to predit the stable valency states of the elements
C) If reflects trends in physical and chemical properties of the elements
D) All of the above
Explanation
(c)
It reflects trends in physical and chemical properties of the elements
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.