Uncommonly Common
Sodium Chloride, NaCl, the chloride of sodium: Common Salt. It is comprised of two highly reactive and dangerous substances: an alkali metal, sodium, and chlorine, a halogen whose vapour can kill or maim anyone inhaling it and used most violently in The First World War as a chemical weapon that left a lasting legacy long after the war ended, with the residual fear of its and other chemical substance's re-use in future conflicts carrying over into The Second World War in the form of universal gas protection measures for both combatants and civilians alike. In the form of their combined salt, however, these two fearsome elements are tamed for the good and this most abundant of materials - salt - is central to our lives and our very existence, providing essential body-chemistry-balancing chemicals that ensure that our bodies continue to function normally. I remember my uncle Edgar, who was a keen amateur chemist and experimenter coming one day into their parlour in the house in which ...