Question

who discovered oxygen, nitrogen, carbon dioxide, argon, helium and hydrogen

Answer 1

OXYGEN

Discoverers

Joseph Priestley

Carl Wilhelm Scheele

NITROGEN

Daniel Rutherford

CARBON DIOXIDE

Joseph Black

ARGON

John William Strutt, 3rd Baron Rayleigh

and

William Ramsay

HELIUM

Pierre Janssen

and

Norman Lockyer

HYDROGEN

Henry Cavendish