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Fluorine has an atomic number 9. It is in period 2 of the periodic table. The diagram shows the electron dot diagram of a fluorine atom.
F with 2 dots each above, right, below and 1 dot left.
How many valence electrons are in an atom of fluorine?
two
seven
nine
seventeen
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seven
Fluorine (atomic number 9) has electron configuration 1s2 2s2 2p5, so there are 7 electrons in the outer (n=2) shell — shown by the seven dots in the diagram.
Fluorine (atomic number 9) has electron configuration 1s2 2s2 2p5, so there are 7 electrons in the outer (n=2) shell — shown by the seven dots in the diagram.
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