Complete the exercises below. Identify the following hydrides as ionic, metallic, or molecular: a. BaH₂, b. H₂Te, c. TiH₁.₇.

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of charged ions. These compounds typically consist of a metal and a non-metal, where the metal donates electrons and the non-metal accepts them. Ionic bonds are characterized by strong electrostatic forces between the oppositely charged ions, leading to high melting and boiling points.

Molecular compounds are formed when two or more non-metals share electrons through covalent bonds. These compounds consist of discrete molecules, and their properties differ significantly from ionic compounds. Molecular compounds generally have lower melting and boiling points and can exist in various states (solid, liquid, gas) at room temperature, depending on the strength of intermolecular forces.

Metallic compounds consist of metal atoms that share a 'sea of electrons' allowing for conductivity and malleability. In metallic bonding, electrons are not bound to any specific atom, which enables the metal atoms to slide past each other without breaking the bond. This unique structure gives metals their characteristic properties, such as luster and the ability to conduct electricity and heat.