Sam Kean

When first presented with the jumble of the periodic table, I scanned for mercury and couldn't find it. It is there - between gold, which is also dense and soft, and thallium, which is also poisonous. But the symbol for mercury, Hg, consists of two letters that don't even appear in its name.

American Writer

Thallium is mainly used in scientific and industrial contexts, rarely in everyday conversation.

Scientific Context

Thallium can be very toxic, hence 'thallium poisoning' is a severe health concern.

Health Hazard

Use 'thallium' with precise terms in science-related discussions, not in vague or general ways.

Precision Language

 scans x-rays thallium for women who breast is in the way of looking at the heart every time we order something that has even a small amount of radiation we say do we really need that test so we're very excited about mr you can't go and