Write the atomic number of the element present in the third period and seventeenth group of theperiodic table.
Question
Write the atomic number of the element present in the third period and seventeenth group of the periodic table.
Solution
The element that is located in the third period and seventeenth group of the periodic table is Chlorine (Cl).
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The third period of the periodic table contains the elements from Sodium (Na) to Argon (Ar): Na, Mg, Al, Si, P, S, Cl, Ar.
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The seventeenth group, also known as the halogens, includes Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).
As Chlorine is the only element that falls into both the third period and seventeenth group, its atomic number is 17.
Final Answer
The atomic number of Chlorine (Cl) is 17.
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