What is the atomic number of element of period 3 and group 17 of the Periodic Table?
10
4
17
21

Academic Chemistry NCERT Class 10

Correct Answer: (c) 17

Explanation: The element that belongs to period 3 and group 17 of the Periodic Table is Chlorine. It belongs to the halogen family and has the atomic number 17.

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Updated on: 10-Oct-2022

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