Chapter 9
Atomic Foundations of Matter
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

The atomic number of fluorine is 9. Explain the formation of the fluorine molecule (F₂). [Pg. No. 170]

Answer: Verified

Fluorine has atomic number 9, so its electronic configuration is 2, 7. Therefore, each fluorine atom has 7 valence electrons and needs 1 more electron to complete its octet. Two fluorine atoms share one electron each and form a single covalent bond. In this way, both atoms complete their outermost shell and form a stable fluorine molecule (F₂).

Electron Dot Structure:

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