Ethanol
...Oxygen In normal conditions is a colourless, odourless and insipid gas, oxygen is as light blue liquid when it condensates. 1
Atomic number
Atomic mass Electro negativity
Density Melting point
Boiling point
Isotopes it exists in
8 15.999 g.mol -1
3.5
1.429 kg/m3 at 20°C
-219 °C
-183 °C
3
Oxygen is a reactive element and it forms oxides with all other elements except the noble gases (helium, neon, argon, and krypton). (To be explained more in next page) 1
Oxygen is placed in group 6A in the periodic table, which means they need two more electrons to complete a stable electron octet. In this group electro negativity decreases as atomic mass increases. Oxygen is more electronegative than any element except fluorine. 1
Oxygen, bonds with itself to form 2 bonds between the atoms (since each atom needs to share 2 electrons). 3
This is the Lewis dot structure for oxygen, indicating that each oxygen atom has 4 shared electrons (2 per bond) and 4 unshared electrons; it gives each a total of 8 and fills the valence shells.3
In a case of water molecule, each water molecule consists of 2 atoms of hydrogen bonded to 1 atom of oxygen, that's why the chemical formula is like H2O. The electrons tend to spend more time around the oxygen atom than the hydrogen atoms, due to greater affinity of oxygen. This unequally shared electrons cause a dipole (partial electrical charge). 3
Due to oxygen's electro negativity, it forms chemical bonds with almost all other elements (which is the origin of the original definition of oxidation). The only elements to escape the possibility of oxidation are a few of the noble gases. The most famous of these oxides is dihydrogen oxide, or water (H2O). Other well known examples include...
View Full Essay
