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

Options

A. It helps to predict the stable valency states of the elements.
B. It reflects the sequence in which electrons fill up the subenergy levels s, p, d and f,
C. It reflects the trends in physical and chemical properties of the elements.
D. It helps to predict the relative ionicity of the bond between any two elements.

Answer

A

Explanation

Can’t predict the stable valency states of elements