Question:

What is the atomic number of fluorine?

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Halogens belong to group 17 and have 7 valence electrons.
Updated On: Oct 27, 2025
  • 9
  • 19
  • 29
  • 39
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The Correct Option is A

Solution and Explanation

Step 1: Recall periodic table.
Fluorine belongs to Group 17 (Halogens).
Step 2: Atomic number.
The atomic number of fluorine is 9. Its electronic configuration is \(2, 7\).
Step 3: Conclusion.
Thus, fluorine has atomic number 9.
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