Question

when two atoms with different electronegativities form a bond, the more electronegative atom attracts electrons away from the less electronegative atom. if one atom is significantly more electronegative than the other, a complete transfer of one or more electrons will occur. the electronegativity difference between two atoms can be used to predict if the atoms will share or transfer electrons to create a chemical bond. for en differences less than 2.0, electrons are generally shared between atoms. for en differences greater than 2.0, electrons are transferred between atoms. this table shows the electronegativities of six elements. element electronegativity f 3.98 o 3.44 s 2.58 mg 1.31 na 0.93 fr 0.7 complete the sentences. shared transferred greater than less than when sodium and fluorine react, valence electrons are between the atoms because their en difference is two. when sulfur and fluorine react, valence electrons are between the atoms because their en difference is two.

Explanation:

Step1: Calculate EN difference for Na - F

The electronegativity of F is 3.98 and of Na is 0.93. The difference is $3.98 - 0.93=3.05$. Since $3.05> 2.0$, electrons are transferred.

Step2: Calculate EN difference for S - F

The electronegativity of F is 3.98 and of S is 2.58. The difference is $3.98 - 2.58 = 1.4$. Since $1.4<2.0$, electrons are shared.

Answer:

When sodium and fluorine react, valence electrons are transferred between the atoms because their EN difference is greater than two. When sulfur and fluorine react, valence electrons are shared between the atoms because their EN difference is less than two.