Yes. The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
Silver, Ag+ NO3- Cations are the positively charged ions in a compound so in this case Ag+ (silver) is the cation.
Potassium.
An ion with a positive charge.-- opposite of an anion.
= cation = An ion or group of ions having a positive charge and characteristically moving toward the negative electrode in electrolysis. An atom, or group of atoms with a positive charge. Cation...