CHEM ATOMIC STRUCTURE TIMELINE

Question 1

LAVOISIER

Answer 1

LAW OF CONSERVATION OF MASS

Question 1

DALTON

Answer 1

LAW OF MULTIPLE PROPORTIONS; FATHER OF ATOMIC THEORY; BILLIARD BALL MODEL

Question 2

THOMSON

Answer 2

DISCOVERED ELECTRONS; PLUM PUDDING MODEL(COOKIE)

Question 3

RUTHERFORD

Answer 3

GOLD FOIL EXPIRIMENT; PEACH PITT MODEL; DISCOVERED NUCLEUS

Question 4

BOHR

Answer 4

ENERGY STATES/LEVELS WITHIN ATOMS; PLANETARY MODEL

Question 5

DEMOCRITUS

Answer 5

INTRODUCED IDEA OF AND NAMED THE ATOM

Question 6

PROUST

Answer 6

LAW OF DEFINITE PROPORTIONS

Question 7

EINSTEIN & PLANCK

Answer 7

WAVE-PARTICLE DUALITY OF LIGHT (Light acts like a wave and a particle)

Question 8

HEISENBERG

Answer 8

UNCERTAINTY PRINCIPLE (You can’t calculate the position and the momentum of an object)

Question 8

MILLIKAN

Answer 8

AMOUNT OF CHARGE OF ELECTRON; MASS OF ELECTRON

Question 9

CHADWICK

Answer 9

DISCOVERED NUETRONS IN NUCLEUS

Question 10

GELL-MANN & ZWEIG

Answer 10

DISCOVERED QUARKS

Question 11

SCHROINGER

Answer 11

WAVE EQUATION (Equation for description of waves); QUANTUM MECHANICAL MODEL

Question 12

BROGILE

Answer 12

WAVE-PARTICLE DUALITY OF ELECTRONS (Electrons act like particles)

Question 13

MOSELEY

Answer 13

ALL ATOMS OF SAME ELEMENT OF SAME # OF PROTONS