-
330
BC, Aristotle
proposes the four element theory of earth, fire, water and air -
Period: 330 to
The Development of the Periodic Table
-
360
BC, Plato
created the term 'elements' (stoicheia) -
Sir Francis Bacon
THE PROFICIENCE AND ADVANCEMENT OF LEARNING described the SCIENTIFIC METHOD in his publication called: -
ROBERT BOYLE
PUBLISHED A PAPER CALLED " THE SCEPTICAL CHYMIST" WHICH DESCRIBED EARLY IDEAS OF ATOMS, MOLECULES AND CHEMICAL REACTIONS -
JOSEPH BLACK
ISOLATED CARBON DIOXIDE AND CALLED IT FIXED AIR -
JOSEPH PREISTLY AND CARL WILHELM SCHEELE
BOTH ISOLATED OXYGEN ON SEPARATE OCCASSIONS -
HENRY CAVENDISH
DISCOVERED HYDROGEN -
ANTOINE LAVOISIER
WROTE A LIST CONTAINING 33 ELEMENTS -
JOHN DALTON
DESCRIBED THE RELATIONSHIP BETWEEN THE COMPONENTS IN A MIXTURE OF GASES -
JAKOB BERZELIUS
INTRODUCED A TABLE OF ATOMIC WEIGHTS AND A SYSTEM OF LETTERS TO SYMBOLIZE ELEMENTS -
JOHANN DOBEREINER
DEVELOPED THREE GROUPS OF ELEMENTS WITH SIMILIAR PROPERTIES -
JOHN NEWLANDS
OBSERVED SIMILIARITIES BETWEEN ELEMENTS AND ARRANGED ELEMENTS INTO ORDER OF ATOMIC WEIGHTS -
LOTHAR MEYER
DEVELOPED AN EARLY VERSION OF THE PERIODIC TABLE OF 28 ELEMENTS -
DIMITRI MENDELEEV
DEVELOPED A TABLE OF 66 ELEMENTS, BASED ON ATOMIC WEIGHTS, ARRANGED PERIODICALLY. -
WILLIAM RAMSAY
DISCOVERED NOBLE GASES -
MARIE AND PIERRE CURIE
ISOLATED RADIUM AND POLONIUM FROM PITCHBLENDE -
ERNEST RUTHERFORD
DISCOVERED THAT RADIOACTIVITY CAME FROM DECAYING ATOMS -
HENRY MOSELEY DETERMINED THE ATOMIC NUMBER FOR ALL THE ELEMENTS AND MODIFIED THE 'PERIODIC LAW'
-
EDWIN MACMILLIAN AND PHILIP H ABELSON
IDENTIFIED NEPTUNIUM PRODUCED BY URANIUM FISSION -
GLENN SEABORG
SYNTHESIZED THE TRANSURANIC ELEMENTS THAT COME AFTER URANIUM IN THE PERIODIC TABLE