#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.
Polyatomic ions are formed when a group of atoms have a charge. Hydroxide, for example, is formed when oxygen and hydrogen covalently bond but still have a charge of -1. When a polyatomic ion forms an ionic bond with another ion, a polyatomic ionic compound is made. For example, the +1 barium ion can form an ionic bond with the -1 hydroxide ion, to form the Barium Hydroxide (BaOH) ionic compound.