Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Atomic Theory

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

Which scientist was responsible for the plum pudding model?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Schrodinger

2.

Which scientist was responsible for the solid sphere model?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

3.

Which scientist was responsible for the nuclear model?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Schrodinger

4.

Which scientist was responsible for the planetary model?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Schrodinger

5.

Which scientist was responsible for the quantum model?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Schrodinger

6.

Who discovered the nucleus?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Schrodinger

7.

Who said that we can only determine the probability of where electrons most likely will be?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Schrodinger

8.

Who is credited with the discovery of the electron?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Dalton

9.

Who determined the atom is mostly empty space?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Dalton

10.

Who did the cathode ray tube experiment?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Dalton

11.

This scientist determined the charge and mass of an electron.

a)

Dalton

b)

Schrodinger

c)

Rutherford

d)

Millikan

12.

Who conducted the gold foil experiment?

a)

Dalton

b)

Schrodinger

c)

Rutherford

d)

Thomson

13.

Who said that electrons behave as waves?

a)

Dalton

b)

Schrodinger

c)

Rutherford

d)

Thomson

14.

Who said that electrons orbit around the nucleus, based on energy?

a)

Bohr

b)

Schrodinger

c)

Rutherford

d)

Thomson

15.

The charge of a proton is...

a)

-1

b)

0

c)

+1

d)

different based on the element

16.

What is the charge on an electron?

a)

-1

b)

0

c)

+1

d)

different based on the element

17.

Which subatomic particle does not contribute significantly to the mass of an atom?

a)

proton

b)

neutron

c)

electron

d)

nucleus

18.

Which subatomic particle is NOT found in the nucleus?

a)

proton

b)

neutron

c)

electron

d)

They are all in the nucleus

19.

Charge of an alpha particle (used in the gold foil experiment)

a)

Positive

b)

Negative

c)

Neutral/nocharge

20.

What makes up the nucleus of an Atom?

a)

protons and neutrons

b)

just protons

c)

just neutrons

d)

electrons

21.

The cathode ray tube experiment led to the discovery of the...

a)

proton

b)

neutron

c)

electron

d)

nucleus

22.

Which answer lists the five atomic models in correct chronological order by scientist?

a)

Thomson - Rutherford - Dalton - Bohr - Schrodinger

b)

Dalton - Thomson - Rutherford - Bohr - Schrodinger

c)

Dalton - Rutherford - Thomson - Bohr - Schrodinger

d)

Dalton - Thomson - Bohr - Rutherford - Schrodinger

23.

Most of the volume of an atom is ________________

a)

empty space

b)

protons

c)

the nucleus

d)

electrons

24.

Whose atomic theory model is this?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

25.

Whose atomic theory model is this?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

26.

Valid conclusion of the gold foil experiment is...

a)

atoms contain negatively charged electrons

b)

atoms have an overall negative charge

c)

atoms are mostly empty space

d)

the nucleus is nearly half the size of an atom

27.

The gold foil experiment led to the discovery of the...

a)

atom

b)

neutron

c)

electron

d)

nucleus

28.

Which scientist proposed this model?

a)

Bohr

b)

Rutherford

c)

Dalton

d)

Thomson

29.

O can combine with C to form CO and CO2. The ratio of the masses of oxygen that combine with carbon is 1:2. This is the:

a)

law of conservation of mass

b)

law of definite composition

c)

law of multiple proportions

30.

In N2O, NO, NO2, and N2O3, atoms combine in small whole-number ratios. This evidence supports the:

a)

law of conservation of mass

b)

law of definite composition

c)

law of multiple proportions

31.

This is the:

a)

law of conservation of mass

b)

law of definite composition

c)

law of multiple proportions

32.

This is the:

a)

law of conservation of mass

b)

law of definite composition

c)

law of multiple proportions

33.

This is the:

a)

law of conservation of mass

b)

law of definite composition

c)

law of multiple proportions

34.

Which of the below points of Dalton's Atomic Theory was NOT true?

a)

Atoms of different elements are different

b)

Atoms are combined, separated, or rearranged (chem reaction)

c)

Atoms combine in whole-number ratios to form compounds

d)

Atoms of given element are identical

35.

Which scientist's model of the atom included electrons embedded in a positively charged sphere?

a)

Bohr

b)

Dalton

c)

Thomson

d)

Rutherford

36.

Which subatomic particle has no electrical charge?

a)

positron

b)

proton

c)

neutron

d)

electron

37.

Which law states that a chemical compound always contains the same elements in the same proportion by mass?

a)

law of constant energy

b)

law of multiple proportions

c)

law of definite composition

d)

law of conservation of mass

38.

Which scientist's experiment provided evidence for the existence of the nucleus?

a)

Dalton

b)

Bohr

c)

Rutherford

d)

Thomson

39.

What is the relative charge of an electron?

a)

+1

b)

-1

c)

0

d)

+2

40.

Which model of the atom describes electrons moving in fixed orbits around the nucleus?

a)

Quantum model

b)

Plum pudding model

c)

Planetary model

d)

Solid sphere model