What are some physical and chemical properties of oxygen?!?
The most abundant element on Earth physical properties: Atomic number 8 Atomic mass 15.999 g.mol -1 Electronegativity according to Pauling 3.5 Density 1.429 kg/m3 at 20°C Melting point -219 °C Boiling point -183 °C Vanderwaals radius 0.074 nm Ionic radius 0.14 nm (-2) Isotopes 4 Electronic shell [ He ] 2s 2 2p 4 Energy of first ionisation 1314 kJ.mol -1 Energy of second ionisation 3388 kJ.mol -1 Energy of third ionisation 5300 kJ.mol – colorless odourless gas condenses to pale blue liquid. occurs in air(21% by volume) essential for most forms of life on earth. cubic crystal found as bas on room temprature. Chemical properties: when reacts with iron ,it forms rust manufactured by distillation of liquid air and heating KClO3 and MnO2 reacts with most elements on heating as it supports combustion.
