Question

name a metal carbonate that doesn't decompose when heated with a bunsen burner.

Answer 1

Cadmium carbonate decomposes at over 500K, so it would not decompose in a bunsen burner.

Answer 2

Nevermid that's wrong. Ignore me.

Answer 3

I'm going out on a limb here so take what I write with a grain of salt. I think almost all carbonates decompose when heated but the "trick" part of the question is "with a bunsen burner." From the information I can find, the decomposition temperature increases for the group II carbonates as one goes down the table. That makes BaCO3 the most stable (excluding radium of course). The information I can find shows the decomposition of BaCO3 at 1300 C. I don't think a common bunsen burner will get that hot. Meker burners and Terrell burners will but I usually consider bunsen burners no higher than 1000 degrees and probably that is a top limit.