Chemistry

Question Analysis
This question involves calculating electronegativity differences (ΔEN) for multiple element pairs to find the largest value. The main focus is on identifying elements from the extreme corners of the periodic table (lowest and highest EN).

Key Concept Explanation
The largest electronegativity differences occur between elements in the bottom-left corner (low EN, e.g., Group 1 metals) and top-right corner (high EN, e.g., Group 17 nonmetals) of the periodic table.

Step-by-Step Solution
1. Recall electronegativity values: Li = 0.98, F = 3.98, Cu = 1.90
2. Calculate ΔEN for each pair:
A. Li and Cu: |0.98 - 1.90| = 0.92
B. F and Cu: |3.98 - 1...