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History of the atomic model

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

a)

J.J. Thomson

b)

Ernest Rutherford

c)

Niels Bohr

d)

Albert Einstein

2.

Who discovered that the atom had an small, dense, positively charged center?

a)

Ernest Rutherford

b)

J.J Thomson

c)

Robert Millikan

d)

John Dalton

3.

Place the following atomic models in order, from earliest to latest:


A) Rutherford B) Thomson C) Dalton

a)

B, C, A

b)

C, A, B

c)

A, C, B

d)

C, B, A

4.

Which scientist discovered that the atom has parts - which means it can be divided?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

5.

In the atomic model nicknamed the "plum pudding" model, what do the plums represent?

a)

the nucleus

b)

the atom

c)

the electrons

d)

the positive material

6.

Who discovered that atoms are mostly empty space?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

7.

Who proposed that electrons move around the nucleus in circular orbits?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

8.

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

9.

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

10.

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

11.

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

12.

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

13.

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

14.

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

15.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
16.

Discovered the neutron

a)

Democritus

b)

John Dalton

c)

JJ Thomson

d)

Robert Millikan

e)

James Chadwick

17.
Which number represents the atomic number of this element?
a)
12.011
b)
6
c)
3
d)
12
18.

Elements in the same group have the same number of ____________.

a)

Valence Electrons

b)

Energy Levels

c)

Protons

d)

Charges

19.

Elements in the same group have similar __________.

a)

Shapes

b)

Properties

c)

Colors

d)

Energy levels

20.

Who developed the Periodic Table of Elements?

a)

Dmitri Mendeleev

b)

Dmitri Mendeleev and Scientists

c)

Dmitri Mendeleev and Julius Lothar Meyer

d)

Dmitri Mendeleev, Julius Lothar Meyer and other Scientists