which bond is least polar? select the correct answer below: o na - cl o s - cl o p - cl o al - cl
which bond is least polar? select the correct answer below: o na - cl o s - cl o p - cl o al - cl
Answer
Answer:
P - Cl
Explanation:
Step1: Recall electronegativity concept
The polarity of a bond depends on the electronegativity difference ($\Delta\chi$) between the two atoms. The smaller the $\Delta\chi$, the less polar the bond.
Step2: Find electronegativity values
Electronegativity of Cl = 3.0. Electronegativity of Na = 0.9, S = 2.5, P = 2.1, Al = 1.6.
Step3: Calculate $\Delta\chi$ for each bond
For Na - Cl: $\Delta\chi=3.0 - 0.9=2.1$. For S - Cl: $\Delta\chi=3.0 - 2.5 = 0.5$. For P - Cl: $\Delta\chi=3.0 - 2.1=0.9$. For Al - Cl: $\Delta\chi=3.0 - 1.6 = 1.4$.
Step4: Compare $\Delta\chi$ values
Since 0.5 (S - Cl) > 0.9 (P - Cl) < 1.4 (Al - Cl)<2.1 (Na - Cl), the P - Cl bond has the smallest electronegativity difference and is the least polar.