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15 questions
Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?
J.J. Thomson
Ernest Rutherford
Niels Bohr
Albert Einstein
Who discovered that the atom had an small, dense, positively charged center?
Ernest Rutherford
J.J Thomson
Robert Millikan
John Dalton
Place the following atomic models in order, from earliest to latest:
A) Rutherford B) Thomson C) Dalton
B, C, A
C, A, B
A, C, B
C, B, A
Who named the positive center of the atom the "nucleus?"
Democritus
Dalton
Thomson
Rutherford
Which scientists believed an atom was indivisible? (Choose all correct responses.)
Democritus
Dalton
Thomson
Rutherford
Which scientist discovered that the atom has parts - which means it can be divided?
Democritus
Dalton
Thomson
Rutherford
Which scientist first suggested that atoms could join?
Democritus
Dalton
Thomson
Rutherford
Which scientist believed that elements differed from one another because their atoms had different mass?
Democritus
Dalton
Thomson
Rutherford
In the atomic model nicknamed the "plum pudding" model, what do the plums represent?
the nucleus
the atom
the electrons
the positive material
Which scientist proposed a new atomic model after discovering the electron in 1897?
Dalton
Thomson
Rutherford
Bohr
Who discovered that atoms are mostly empty space?
Dalton
Thomson
Rutherford
Bohr
Which scientist was the first to benefit from the Lavoisier's efforts to define pure substances in the 1700's?
Dalton
Thomson
Rutherford
Bohr
In the model nicknamed "the solar system model" what are the electrons like?
the sun
the nucleus
the planets
the moon
Who proposed that electrons move around the nucleus in circular orbits?
Dalton
Thomson
Rutherford
Bohr
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