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


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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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