Element: Na (sodium), Cl2 (chlorine), O2 (oxygen), Co (cobalt), He (helium), N2 (nitrogen), Ag (silver), Li (lithium), F2 (fluorine), Compound: HCl (hydrochloric acid), CO2 (carbon dioxide), H2O (water), CO (carbon monoxide), CH4 (methane), CuSO4 (copper sulfate), NO2 (nitrogen dioxide), LiOH (lithium hydroxide), LiCl (lithium choride),

Element or Compound?

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