Question

In the modern periodic table the period indicates the value of:
a.) Atomic number
b.) Atomic mass
c.) Principle quantum number
d.) Azimuthal quantum number

Answer 1

Hint: Before attempting this question one should have prior knowledge about the periodic table and what period in the periodic table represent, use this information to approach towards the solution to the question.

Complete step by step solution: A periodic table is an arrangement of chemical elements which are organized in the manner of their atomic number, on the basis of their electronic configuration and the chemical properties shown by the chemical elements.
Each element located in the periodic table has a principal quantum number (n) for the outermost shell and the valence shell of the element here; the principal quantum number represents the period in the modern periodic table.

Hence in the modern periodic table, the period indicates the principal quantum number of chemical elements arranged in the periodic table.

Note: From all the terms mentioned in the option only principal quantum number indicates the period of a periodic table which represents the outermost cell and valence cell, Azimuthal quantum number also defines the characteristics of a chemical element such as angular momentum and orbital angular momentum of an atomic electron. Now let’s discuss the term Atomic number which explains the number of protons present in the nucleus of an atom whereas atomic mass is the measurement of the average weight of all the isotopes present in the element.