The number of elements present in period 3 is:

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answer is B.

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Detailed Solution

8 elements are present in period 3.
All the elements presently understood are arranged using the periodic table of today. The table's elements are arranged according to increasing atomic numbers. Each element is symbolised by its chemical symbol within the modern periodic table. The third period of the modern periodic table contains eight elements which include sodium (Na), magnesium (Mg), aluminium (Al), silicon (Si), phosphorus (P), sulphur (S), chlorine (Cl), and argon (Ar).

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