"chlorine" - key terms from Wikipedia

chlorine
chlorine	and bromine
chlorine	atom
chlorine	atoms
chlorine	bleach
chlorine	by mass
chlorine	compounds
chlorine	dioxide
chlorine	dioxide is used
chlorine	gas
chlorine	made
chlorine	monoxide
chlorine	production
chlorine	washings
contains chlorine
elemental chlorine
free chlorine
liquid chlorine
stratospheric chlorine