Metal poisoning is a toxic accumulation of metals in the body. Some metal elements that are poisonous if ingested are Mercury, lead, aluminum, arsenic and cadmium.
Several are such as lead, but mercury (the only metal that is a liquid at room temperature) is very poisonous.
Arsenic
No, for instance Ilmenite is not poisonous.
The element that is useful but poisonous when ingested is mercury. That is why there is concern over the safety of some fish consumption due to high mercury content.
Mercury Mercury
no
The seeds are poisonous if ingested.
Only to animals.
Yes they are poisonous if ingested
Mercury is the only metal that is liquid at room temperature. It is one of the two elements that are liquid at room temperature. The other one, bromine, is not considered a metal.
Probably, depending on the dose ingested. I would certainly call an animal emergency hospital and ask their advice.
The biannual flower, the Foxglove, is poisonous, and should not ingested.