Final answer:
In pairs of elements, the one that is higher up and/or to the right in the periodic table is generally more electronegative due to periodic trends. Chlorine, oxygen, and nitrogen tend to be more electronegative than their paired elements.
Step-by-step explanation:
The subject of this question is Chemistry, specifically related to electronegativity and the periodic table. Determining which atom in each pair is more electronegative can be done by considering the general trends on the periodic table: electronegativity increases from left to right across a period and decreases down a group.
Therefore, for each pair given:
- (a) Chlorine (Cl) is more electronegative than bromine (Br).
- (b) Oxygen (O) is more electronegative than nitrogen (N).
- (c) Oxygen (O) is more electronegative than sulfur (S).
- (d) Sulfur (S) is more electronegative than phosphorus (P).
- (e) Nitrogen (N) is more electronegative than silicon (Si).
- (f) Phosphorus (P) is more electronegative than barium (Ba).
- (g) Nitrogen (N) is more electronegative than potassium (K).