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. 

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  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 chloride); thallium also dissolves in sulfur and in nitric acids.

        - Thallium exhibits 4 oxidation phases.

• Location in Periodic Table:

        - Thallium is part of the Boron family.

        - Thallium belongs to the sixth period.

• Bohr's model:

        - Thallium has 81 protons, 81 electrons, and 124 neutrons.

• Thallium classification and uses:

        - Thallium is a metal.

        - Thallium is used mainly in electronics, optical glasses, and in medical imaging. In the past it was used in rat traps but its use was banned because thallium is too toxic and radioactive for home use. 

• Discovery:

        - Thallium was discovered in 1861 by Sir William Crookes.

        - It was discovered when Crookes was testing out a new technique for analyzing dust particles called flame spectroscopy, when suddenly he noticed a light green spectral line in the mechanism.

• Thallium Fact:

        -Thallium can be found in large ore deposits. Each ore deposit has about 0.7 part per million. The price for buying 25g of thallium is around 120 dollars.

THALLIUM: THE ELEMENT YOU DIDN'T KNOW YOU NEEDED

• Bibliography:

        -Thallium (Tl) - Periodic Table. (n.d.). Www.periodictable.one. https://www.periodictable.
one/element/81

‌        -Thallium | chemical element. (n.d.). Encyclopedia Britannica. https://www.britannica.com/science/thallium

‌        -Stwertka, Albert (2002) A guide to the elements. New York: Oxford University Press. 

        -Google Images. (2019). Google.com. https://www.google.com/imghp

$-11.85{\text{g/cm}}^3$11.85 g/