An ionic compound is a pure substance that is formed from a metal and a nonmetal. It has a fairly high melting point and is a conductor of electricity when in a molten or aqueous state . A molecular compound, on the other hand, is a pure substance that is formed from nonmetals. It has a fairly low melting point, and cannot conduct electricity regardless of state. Another important difference between the two is that an ionic compound is a crystalline solid at standard ambient temperature and pressure (SATP), whereas a molecular compound can be in a solid, gas or liquid state at SATP.
Molecular compound
H2O is a molecular compound.
Ionic Molecular
Nickel manganate is an ionic compound.
molecular, since it is an organic compound
molecular
Fluorine is molecular, but it is an element, not a compound.
It's molecular
A molecular covalent compound
Molecular.See the Related Questions to the left for how to determine if a molecule is molecular of ionic.
Dissolve them in water. If the solution conducts electricity, then the solute is an ionic compound. If not, then it is a molecular compound.
Anhydrous H2CO3 (carbonic acid) is molecular, not ionic. It does not dissociate into ions in the absence of water.