What is the strongest evidence for hydrogen
bonding?
1. Hydrogen has an extremely low electronegativity.
2. The boiling points of NH3, H2O, and HF
are abnormally high compared with the rest
of the hydrides in their respective periods.
3. Hydrogen can be considered either a
metal or nonmetal.
4. Hydrogen is able to accept or donate electrons, so it is the most versatile atom in the
periodic chart.

The strongest evidence for hydrogen bonding is that Hydrogen has an extremely low electronegativity and the boiling points of NH₃, H₂O and HF is high.

What are hydrogen bonds?

Hydrogen bonds are formed between the hydrogen atom which is a electropositive atom and highly electronegative atoms like F, O, N, etc.

Hydrogens have the least electronegativity or electropositive atom.
As hydrogen bond is one of the strong bond, so amount of energy required for boiling of NH₃, H₂O and HF is high as in these molecules hydrogen bond is present.
Hydrogen is a non metal and it is placed in the 1st group of periodic table.
Hydrogen is a versatile atom as it is readily accepts an electron to form H⁻, and readily losses an electron to form H⁺ ion.

Hence hydrogen has an extremely low electronegativity and has a versatile nature, and boiling points of NH₃, H₂O and HF is high.

To know more about hydrogen bonding, visit the below link:
https://brainly.com/question/1420470