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Thorium is on the periodic table labelled as Th. pure Thorium look silvery white metal and stable in air. it has a very high melting point of 3300 deg C.

it is a very comment element on earth, hence people are constantly being exposed to it in small amounts. We tend to be exposed to them by drinking water and consuming food.

Hazards arrises when exposed to large quantities. chances of poor handling of thorium disposal causes the element to be airborne. when inhaled in large amount, it could result to lung diseases and pancreatic cancer. Breathing massive amount of thorium is deadly as a result to metal poisoning. 

Thorium is known to be able to alter genetic materials and can be stored in the bone. hence increasing the chances of cancer.