Atomic Number: Differentiating Elements

[linux kid]

This is very interesting to me. Does every element differentiates solely by it's atomic number?

 

[Hootenanny]

Yes each element has its own unique proton number. Elements can have different isotopes which have a differing number of neutrons, but the same number as protons as the element. Deuterium and Tritium are two isotopes of Hydrogen for example.