why are sodium and chlorine placed in the same period in the modern periodic table

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Solution

Dear Student,

The period number represent the number of electron shells of atoms of elements.

Na - 2,8,1

Cl - 2,8,7

Since, Na and Cl have 3 electronic shells, therefore they are placed in 3rd period of periodic table.

Regards

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why are sodium and chlorine placed in the same period in the modern periodic table

Dear Student, The period number represent the number of electron shells of atoms of elements. Na - 2,8,1 Cl - 2,8,7 Since, Na and Cl have 3 electronic shells, therefore they are placed in 3rd period of periodic table. Regards

Dear Student,

The period number represent the number of electron shells of atoms of elements.

Na - 2,8,1

Cl - 2,8,7

Since, Na and Cl have 3 electronic shells, therefore they are placed in 3rd period of periodic table.

Regards