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Periodic Table Links

 Group 1  Group 2  Group 3-12  Group 15   Group 16   Group 17  Group 18  

Group 16 The Chalcogens (Oxygen Family)

Oxygen

Preparation of Liquid Oxygen using liquid nitrogen

 

Paramagnetic Liquid O2-Liquid oxygen is paramagnetic and attracting to the magnet.

 

Burning a diamond 

 

Iron burning in atmosphere of pure oxygen

 

A nonmetal, colorless gas. Oxygen is the most abundant chemical element, by mass, in our biosphere, air, sea and land. Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. There are two allotropes, O2 (oxygen) AND O3 (ozone).

They are both reactive, however ozone is much more reactive. It decompose when exposed to UV light. That is how the ozone layer protects us.

Liquid Oxygen is blue

Cigarette placed for few seconds inside the dewar with the liquid oxygen and lighted up.

 

Sulfur

  Sulfur (S8 - octatomic) is a brittle nonmetal. At room temperature, sulfur is a soft, bright-yellow solid with only a faint odor, similar to that of matches (the strong "smell of sulfur" usually refers to the odor of hydrogen sulfide (H2S)  Its commercial uses are primarily in fertilizers, but it is also widely used in black gunpowder, matches, insecticides and fungicides.

 

 

Barking Dog Reaction

4CS2 + 8N2O --> S8 + 4CO2 + 8N2 + Energy

 

Sulfur burning in atmosphere of pure oxygen

Selenium Tellurium
 

Polonium

on to Group 17 The Halogens

Chemical Demonstration Videos