How do I get key codes for chemical Abbreviations

[pj]

How do I get key codes for chemical Abbreviations

 

[Mike H]

Hi,

What do you mean by 'Chemical abbreviations'?

NH3
HN03
H2O

If that's what you mean there are none.

Mike

 

[Gr8 Dane]

If you are talking about the Abbreviations, Goodle the Periodic Table.