Question
Chemistry Question on Modern Periodic Law And The Present Form Of The Periodic Table
In the modern periodic table, the period indicates the value of:
A
atomic number
B
atomic mass
C
principal quantum number
D
azimuthal quantum number.
Answer
principal quantum number
Explanation
Solution
All you have to do is glance at the periodic table to comprehend it. Elements from various periods usually begin with the next number when writing their electronic structures, indicating an increase in the primary quantum number. Hence,the value of the principal quantum number (n) for the outermost shell or the valence shell indicates a period in the Modern periodic table.
Therefore, the correct option is (c): principal quantum number