MOLECULAR POLARITYFIELD NOTE 123 / 175
Is HI polar or nonpolar?
HI is polar because iodine and hydrogen share electrons unequally in their single bond.
Hydrogen Iodide · linear
The molecule in space
Drag to turn the molecule. A two-atom molecule has no bond angle.
01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗
Why HI is polar
Hydrogen iodide is polar because iodine (2.66) is more electronegative than hydrogen (2.20).
What to notice
The H–I electronegativity difference is smaller than in HF or HCl, but it is still unequal. HI remains polar.
Common questions about HI
- 01
What does the Lewis structure of HI show?
H and I share one single bond. I keeps three lone pairs.
- 02
What is the molecular geometry of HI?
HI is a two-atom molecule, so its geometry is linear. A bond angle needs three atoms and is not defined here.
- 03
What is the molar mass of HI?
HI has an approximate molar mass of 127.91 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.