Chemistry

Question Analysis
This question involves classifying a bond type based on a given electronegativity difference value. The main focus is on applying the ΔEN threshold rules for bond classification.

Key Concept Explanation
Bond type is defined by ΔEN ranges:
ΔEN < 0.4: Nonpolar covalent
0.4 ≤ ΔEN < 1.7: Polar covalent
ΔEN ≥ 1.7: Ionic

Step-by-Step Solution
1. Recall the ΔEN threshold for ionic bonds (≥ 1.7).
2. Compare the given value (2.1) to the threshold: 2.1 > 1.7.
3. Assign th...