Chemical symbol is the letter(s) given to an element based on either its english or latin name

 

A is also called the nucleon number. 

 

Try playing around with the elements or build your own atom in applet 1. You should also attempt the questions in the applet to see if you have mastered everything so far.

 

Refer to the applet 1 for more examples of atomic structures of other elements- helium (He), carbon (C), neon (Ne), chlorine (Cl), iron (Fe)