Atomic Theory- Scientist Timeline: Question Preview (ID: 16456)


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Created the atomic theory
a) Dalton
b) Rutherford
c) Chadwick
d) Democritus

Believed that atoms of a given element are identical
a) Dalton
b) Thomson
c) Rutherford
d) Chadwick

Discovered that the atom is mostly empty space
a) Rutherford
b) Dalton
c) Chadwick
d) Democritus

Hypothesized that the atom was a tiny hard sphere
a) Chadwick
b) Dalton
c) Rutherford
d) Thomson

Discovered the neutron
a) Chadwick
b) Dalton
c) Rutherford
d) Heisenberg

Uncertainty principle (a particle's position, energy and time can never be precisely known)
a) Chadwick
b) Dalton
c) Bohr
d) Heisenberg

Determined that the properties of elements are periodic (or in trends)
a) Bohr
b) Mendeleev
c) Heisenberg
d) Chadwick

Found the missing mass of the atom's nucleus
a) Democritus
b) Mendeleev
c) Chadwick
d) Dalton

Greek philosopher
a) Democritus
b) Chadwick
c) Dalton
d) Thomson

Created the first periodic table.
a) Rutherford
b) Bohr
c) Mendeleev
d) Dalton

Believed that the universe was made of tiny uncuttable particles
a) Democritus
b) Mendeleev
c) Chadwick
d) Dalton

Who discovered that the proton had a positive charge?
a) Chadwick
b) Bohr
c) Dalton
d) Rutherford

Who did the gold foil experiment?
a) Democritus
b) Mendeleev
c) Rutherford
d) Chadwick

Who created a model of the atom with electrons moving around the nucleus in fixed orbits?
a) Thomson
b) Bohr
c) Rutherford
d) Democritus

Who discovered the electron?
a) Thomson
b) Bohr
c) Rutherford
d) Goldstein

Use the cathode ray tube in his discovery
a) Dalton
b) Mendeleev
c) Heisenberg
d) Thomson

Created the plum pudding model of the atom.
a) Thomson
b) Dalton
c) Mendeleev
d) Chadwick

Worked with the Quantum Theory
a) Heisenberg
b) Thomson
c) Daltong
d) Democritus

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