Thallium Element

 Thallium, TI 204.38, 81 Physical Properties:                -  Thallium is a metal with a soft and malleable form that can even be cut with a knife.            -Thallium's boiling point is 1473 degrees Celsius and it has a relatively low melting point at 304 degrees Celsius.           -Thallium has a density of 11.85 g/cm3.          -Its normal physical state is solid form, though it is soft compared to other elements.  Chemical Properties:          -  Thallium's atomic number is 81 and it has an atomic mass of 204.38.           - Thallium is extremely toxic and radioactive to the human body.           - Thallium can react with oxygen (to create oxide), water (to from thallium hydroxide), and with hydrochloric acid (to form thallium chlori...