1. By Patrick Gaughan

2.  Tendency for metallic properties as you go down the group.  Configuration n 2 np 4  Do not behave as typical metals

3.  Can form Covalent bonds with other non metals  Those with D orbital's can be surrounded by more than 8 electrons  Selenium prevents cancer and is a semi- conductor  Polonium discovered by Madam Carrie.  Radioactive

4.  Ultra important  Paramagnetic – blue liquid  O 2  Low boiling point  Gaseous  Used in many biological processes

5.  O 3  Resonate  Bond angle 117 0  Vesper model  Ozonolysis  Ozone layer Absorbs UV light UV  Thermal energy O3(g)  O2(g) + O(g) light wavelength < 290 nm)

6.  Frasch Process  Super heated water  60%  Sulfur oxides  SO- weak bond  SO 2 –most common  SO 3 – Resonance

7.  Oxy acids  SO 3 + H 2 O  H 2 SO 4  Extremely important acid  Thiosulfate ion