How do you identify a cation?

It is a positively charged ion and can be identified by adding acids or bases

Potassium bromide, KBr: K+ - cation, Br- - anion

The heat of the flame excites the metals ions, causing them to emit visible light. The characteristic emission spectra can be used to differentiate between some elements.

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...