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Worksheets

Atom Models

Total questions: 10

Worksheet time: 4mins

Name
Class
Date
1.

Who discovered electrons?

a)

J.J. Thomson

b)

Ernst Rutherford

c)

James Chadwick

d)

Niels Bohr

2.

Who discovered neutrons?

a)

Ernst Rutherford

b)

James Chadwick

c)

J.J. Thomson

d)

Niels Bohr

3.

Which word would closely resemble the term 'atomos'

a)

indivisible

b)

inedible

c)

independent

d)

incredible

4.

The atomic mass is dependent on which two subatomic particles?

a)

Protons and electrons

b)

Neutrons and electrons

c)

Protons and neutrons

d)

Electrons and the nucleus

5.

Electrons and protons are always equal making the atom electrically ___________.

a)

charged

b)

negative

c)

positive

d)

neutral

6.

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

a)

John Dalton

b)

J.J Thomson

c)

Eugen Goldsteinin

d)

Ernst Rutherford

7.

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

a)

Democritus

b)

Dalton

c)

Thomson

d)

Goldsteinin

8.

In the atomic model nicknamed the "plum pudding" model, what do the nuts/ currants/ dry fruits represent?

a)

the nucleus

b)

the atom

c)

the electrons

d)

the positive sphere

9.

For which of the following reasons did Rutherford select alpha particles for his experiment?

a)

they were heavy and had high energy.

b)

they displace electrons

c)

they could be easily detected

d)

they could be easily collimated

e)

they excited electrons to higher energy level

10.

Identify the scientist.

a)

Ernst Rutherford

b)

Democritus

c)

Niels Bohr

d)

John Dalton