Question

part 1 (1 point) which of the following forms the most polar bond? choose one: n and o h and f n and f f and c

Explanation:

Step1: Recall electronegativity concept

The polarity of a bond depends on the electronegativity difference between the two atoms. The greater the electronegativity difference ($\Delta \chi$), the more polar the bond.

Step2: Identify electronegativities

The electronegativity values from the Pauling scale are: $\chi_H = 2.20$, $\chi_C=2.55$, $\chi_N = 3.04$, $\chi_O=3.44$, $\chi_F = 4.0$.

Step3: Calculate electronegativity differences

For N - O: $\Delta\chi=3.44 - 3.04=0.4$.
For H - F: $\Delta\chi=4.0 - 2.20 = 1.8$.
For N - F: $\Delta\chi=4.0 - 3.04 = 0.96$.
For F - C: $\Delta\chi=4.0 - 2.55 = 1.45$.

Step4: Compare differences

Among the calculated $\Delta\chi$ values, 1.8 (for H - F) is the largest.

Answer:

B. H and F