Respiration & Breathing

Food alone cannot provide energy for living organisms to survive. The energy has to be released from the food. it is done by combining food with oxygen. During this process carbon dioxide is released as a by-product. This process is called respiration. Respiration may...

Fluorine

Atomic mass : 15.998403 g.mol-1 Electronegativity according to Pauling : 4 Density : 1.8*10*3g.cm3 at 20 °C Melting point : -219.6 °C Boiling point : -188 °C Vanderwaals radius : 0.135 nm Ionic radius : 0.136 nm (-1) ; 0.007 (+7) Isotopes : 2 Electronic shell : [He]...