ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Sodium burning in air. Sodium (symbol Na) is a reactive metallic element of group one of the periodic table. It reacts vigorously with atmospheric oxygen (O2) to form sodium oxide (Na2O). The equation for the reaction is: 4Na + O2 ---> 2Na2O Due to its reactive nature, sodium metal is always stored under oil.
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