#2 of 5 hotels in Chenonceaux. â 1  Best romantic chateau of the Loire Valley 2  â. Roseraie hotel is really close to the Chateau. 3  November 27, 2016.
A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond. In this coordinate covalent bond, the oxygen from the water... A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond.
hydronium /hyÂ·droÂ·niÂ·um/ (hi-droÂ´ne-um) the hydrated proton H3O+; it is the form in which the proton (hydrogen ion, H+) exists in aqueous solution, a combination of H+ and H2O. hydronium the hydrated proton H 3 O+; exists in aqueous solution, a combination of H+ and H 2 O.