I've usually seen it as 'Z' but that might vary between different textbooks.
The abreviation for Alberta is AB. Another abreviation for Alberta is Alta, allthough I have'nt seen that one used since I was a kid.
Ca.
Div.
col.
pt.
Gr.
abbreviation
IL
HI
ml
TX
this elemnt has an atomic number that is double the atomic number of silicon?