No. These are not heavy metals. They are salts of non heavy metals.

Heavy metals are typically found in the middle of the periodic table. These heavy metals are often also transition metals.

Heavy metals compounds have frequently toxic properties.

It can have small amounts of heavy metals, depends where it comes from. - If you are concerned take a sample for lab analysis.

It can have heavy metals, depends where it comes from. If you are concerned take a sample for lab analysis.

they are considered heavy metals because of the weight to volume ration in comparison to other metals. they have more mass with little volume than other metals do.