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Atomic History

Total questions: 25

Worksheet time: 3625secs

Name
Class
Date
1.

Which scientist was the first person responsible for proposing the idea of atoms?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

2.

Which scientist was the first person responsible for proposing the discovery of the electron?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

3.

Which scientist was the first person responsible for proposing the discovery of the nucleus?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

4.

Which scientist claimed that the atom was a small, dense, solid sphere?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

5.

Which scientist's model is referred to as the Plum Pudding Model?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

6.

Which scientist proposed the idea that the electrons orbited the nucleus on fixed paths with designated energies?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

7.

Which man proposed that the atom was indivisible using the word "atomos"?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

8.

Which model of the atom is the most up to date model?

a)

The Billiard Ball Model

b)

The Plum Pudding Model

c)

The Planetary Model

d)

The Quantum Mechanical Model

e)

The Nuclear Model

9.

What were J. J. Thomson's three contributions to the atomic theory?

a)

Discovered the electron

b)

Discovered the nucleus -did the gold foil experiment

c)

Used the cathode ray tube in his discovery

d)

Created a model of the atom with electrons moving around the nucleus in fixed orbits

e)

Created the "plum pudding" model of the atom

10.

What are two facts about Democritus's?

a)

Greek philosopher

b)

Used the cathode ray tube in his discovery

c)

Believed that the universe was made of tiny "uncuttable" particles

d)

Discovered that the atom is mostly empty space

11.

What were Ernest Rutherford's three contributions to atomic theory?

a)

Discovered that the atom is mostly empty space

b)

Discovered the nucleus- did the gold foil experiment

c)

Used the cathode ray tube in his discovery

d)

Discovered the electron

e)

Discovered that the nucleus (and later the protons specifically) had a positive charge

12.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
13.
Who came up with this model of an atom?
a)
J.J. Thompson
b)
Ernest Rutherford
c)
Neils Bohr
d)
James Chadwick
14.
Who's model is this?
a)
Thomson
b)
Rutherford
c)
Democritus
d)
Bohr
15.

Discovered neutral particles IN the nucleus of atoms.

In other words, he found the neutrons.

a)
Niels Bohr
b)
Ernest Rutherford
c)
J.J. Thomson
d)
James Chadwick
16.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
17.
In the Thomson Model, he discovered the existence of what particle?
a)
Electrons
b)
Protons
c)
Neutrons
d)
Quarks
18.
Rutherford’s experiment determined that the nucleus of an atom is tiny, dense and  ______ charged. 
a)
neutrally
b)
negatively
c)
positively
19.
Democritus believed that the smallest particles, were atomos, the Greek word for 
a)
small
b)
uncut or indivisible
c)
basic
20.

Mass is neither created nor destroyed during chemical reactions or physical changes.

a)

Law of multiple proportions

b)

law of definite proportions

c)

law of scientific theory

d)

law of conservation of mass

21.

Which scientist's model is referred to as the Cookie Dough Model?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

22.

Who originally stated the law of Conservation of Mass - that mass is neither created nor destroyed during chemical reactions or physical changes.

a)

Thomson

b)

Rutherford

c)

Antoine Lavoisier

d)

Fred

e)

Barney

23.

Who performed the gold foil experiment?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

e)

Bohr

24.

Which scientist was the first person responsible for proposing the idea of atoms?

a)

Democritus

b)

John Dalton

c)

Ernest Rutherford

d)

J.J. Thomson

e)

Niels Bohr

25.

The newest, most current model of the atom is called the (choose two)

a)

Electron Cloud Model

b)

Cookie Dough Model

c)

Solar System Model

d)

Bohr

Model

e)

Quantum Mechanical

Model

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