Question

In the periodic table, the period number corresponds to

• A. the number of valence electrons in the outermost shell of the elements
• B. the highest principal quantum number $(n)$ of the elements
• C. the total number of elements in the corresponding period
• D. none of the above.

Answer 1

Answer: (B)

the highest principal quantum number $(n)$ of the elements

Answer 2

Answer (b) the highest principal quantum number $(n)$ of the elements