Question

When one atom of sodium (Na) combines with one atom of fluorine (F), they form the compound sodium fluoride (NaF). Which of the following best describes the arrangement of valence electrons in a bond between Na and F?

1. The valence electrons are shared equally between Na and F.
2. The valence electrons spend more time around the atom of Na.
3. The valence electrons spend more time around the atom of F.
4. The valence electrons are given up by the Na and gained by the F.

Answer 1

The correct answer is:
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4) "The valence electrons are given up by the Na and gained by the F. "
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Answer 2

4. The valence electrons are given up by the Na and gained by the F.

Step-by-step explanation:

Sodium and fluorine bond ionically, they do not share electrons. Instead, ionic bonding involves the each atom of the metal, sodium, giving up its one electron in it's valence shell to each atom of the non-metal, fluorine.