Group 1A element sodium combines with Group 7A element chlorine to form sodium chloride or table salt. Based on this information
, which expression is true about the electronegativity values of these two elements? A) Na > Ci
B) Na < Ci
C) Na = Ci
D) We cannot make a prediction with data provided.
The correct answer in this question is option B. The electronegativity increases across a group. Chlorine ion has a higher electronegativity than the sodium ion. Chlorine need one electron to have a noble gas configuration that is why it gets one electron every chance it makes.