what is the polarity of HI
the I end is negative.
To determine the polarity of a molecule, you need to consider the molecular geometry and the electronegativity difference between the atoms involved.
In the case of HI (hydrogen iodide), it is a diatomic molecule consisting of hydrogen (H) and iodine (I). Hydrogen has an electronegativity of approximately 2.2, while iodine has an electronegativity of around 2.7.
Since the electronegativity difference between hydrogen and iodine is relatively small (0.5), the bond in HI is considered to be a polar covalent bond. This means that iodine attracts the shared electrons more strongly than hydrogen, resulting in a partial negative charge (δ-) on iodine and a partial positive charge (δ+) on hydrogen.
However, in terms of the overall polarity of the HI molecule, you need to consider its molecular geometry. HI has a linear molecular geometry, meaning that the hydrogen and iodine atoms are directly opposite each other. In this arrangement, the polarities of the individual bonds (H-I) do not cancel each other out. Therefore, HI is considered to be a polar molecule, with the δ- end on the iodine side and the δ+ end on the hydrogen side.
In summary, HI is a polar molecule due to the presence of a polar covalent bond and its linear molecular geometry.