Question

Atomicity of hydrogen iodide

Answer 1

Each hydrogen atom has one electron to gain stability it has to gain another electron

Answer 2

The atomicity of hydrogen iodide is 2.

• Atomicity is defined as the number of atoms present in the molecule. The molecule hydrogen halide has one hydrogen atom and one iodine atom joined by a combination reaction.
• As per the known fact, hydrogen has one electron in its outermost shell. Thus, it needs only one electron to complete its octet.
• Moreover, iodine has seven electrons in its outermost shell. Hence, it also needs one electron to complete its octet.
• Therefore, hydrogen and halide share their electrons to complete the octet.