Question

Identify the wrong statement for long form of periodic table.

• A. It reflects the sequence of filling the electrons in the order of energy levels K, L, M, N
• B. It helps to predict the stable valence states of the elements
• C. It reflects 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 1

Answer: (B)

It helps to predict the stable valence states of the elements

Each group of the long form of periodic table signifies same outer shell electronic configuration i.e. a same number of valence electrons and not the stable valence state of elements.

Hence, option $B$ is correct.