It could be Calcium Oxide, or the accronym for the US Army Casualty Assistance Officer.
Magnetic ink character recognition systems offer high security levels because the MICR characters are written using iron oxide ink and follow a strict format, which makes it virtually impossible to forge; however, these specialized systems are costly and can only be used to read MICR fonts written in specific formats.
Ionic
Ionic
Ionic
Ionic
Chlorine oxide would be a covalent compound, and not an ionic compound.
Lithium oxide is an ionic lattice.
Ionic
Ionic
Dihydrogen oxide, water, is a polar covalent compound.
covalent bond
Ionic.
Ionic. This is the best decription of FeO, iron(II) oxide.