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Home » The period number in the long form of the periodic table is equal to(i) magnetic quantum number of any element of the period.(ii) an atomic number of any element of the period.(iii) maximum Principal quantum number of any element of the period.(iv) maximum Azimuthal quantum number of any element of the period.
The period number in the long form of the periodic table is equal to
(i) magnetic quantum number of any element of the period.
(ii) an atomic number of any element of the period.
(iii) maximum Principal quantum number of any element of the period.
(iv) maximum Azimuthal quantum number of any element of the period.
CBSE | Chemistry | Class 11 | Classification of Elements and Periodicity in Properties | NCERT Exemplar
The period number in the long form of the periodic table is equal to
(i) magnetic quantum number of any element of the period.
(ii) an atomic number of any element of the period.
(iii) maximum Principal quantum number of any element of the period.
(iv) maximum Azimuthal quantum number of any element of the period.

Option (iii) is the answer.

Period number = maximum n of any element where ‘n’ stands for the principle quantum number. It determines the element’s period number. Mg, for example, has a maximum main quantum number of 3 and hence belongs to the periodic table’s third period.

i

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