Which of the following statements is/are true for the long form of the periodic table?

Options

A. It reflects the sequence of filling the electron in the order of sub-energy level s, p, d and f
B. It helps to predict the stable valency states of the elements
C. It reflects trends in physical and chemical properties of the elements
D. It helps to predict the relative ionic strength of the bond between any two elements

Answer

A, B, C, D

Explanation

The long from of the periodic table does not help to predict the stable valency states of the elements.