Points
The electronic configuration of many ions is that of the closest noble gas to them in the periodic table.
An anion is an ion that has gained one or more electrons, acquiring a negative charge.
A cation is an ion that has lost one or more electrons, gaining a positive charge
						

							
Dear student 
Here are several examples of anions:
Bromide - Br -
Chloride - Cl -
Fluoride - F -
Iodide - I -
Nitride - N 3-
Oxide - O 2-
Sulfide - S 2-
An example of a cation would be the sodium cation when it dissociates from chlorine anion. The sodium has its electron taken from it by chlorine, becoming positive. An easy way to remember that cations are the ions with a positive charge is to remember the phrase "cats are positive
						

							
dear friend
Cation vs anion chart
	
		
			
 
			
Cation
			
Anion
		
		
			
Charge
			
Positive
			
Negative
		
		
			
Electrode attracted to
			
Cathode (negative)
			
Anode (positive)
		
		
			
Formed by
			
Metal atoms
			
Non-metal atoms
		
		
			
Examples
			
Sodium (Na+), Iron (Fe2+), Ammonium (NH4+)
			
			
Chloride (Cl-), Bromide (Br-), Sulfate (SO42-)
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
 
			
thank u