Question

The statement that is true for the long form of the periodic table is:

• A. it reflects the sequence of filling electrons in the order of sub-energy levels 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 elements
• D. All of the above

Answer 1

The correct option is D All of the above

All the characteristic features of modern periodic table.