what is the overall polarity of this molecule? nonpolar polar
what is the overall polarity of this molecule? nonpolar polar
Answer
Explanation:
Step1: Analyze electronegativity difference
As (arsenic) has an electronegativity of 2.18 and H (hydrogen) has an electronegativity of 2.20. The electronegativity difference $\Delta\chi=|2.20 - 2.18|= 0.02$, which is very small.
Step2: Consider molecular geometry
The $AsH_3$ molecule has a trigonal - pyramidal geometry due to the presence of a lone pair on the arsenic atom. The bond dipoles do not cancel out.
Answer:
polar