To which period number of the table, do Zinc belong? (Atomic number of zinc is 30).

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Solution

The correct option is D 4
The period number of an element can be found when its atomic number is given. The total number of shells indicates the period number. Here, the atomic number of zinc is 30. Electronic configuration of zinc is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s² . Zinc belongs to the 4th period because its atom has four shells.

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