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Atomic Structure

Total questions: 40

Worksheet time: 22mins

Name
Class
Date
1.

Which particle has a positive charge?

a)

electron

b)

electron cloud

c)

proton

d)

neutron

2.

Choose the particle that has no charge.

a)

nucleus

b)

neutron

c)

proton

d)

electron

3.
An electron has a _____ charge.
a)
negative
b)
positive
c)
neutral
4.

What does the nucleus of an atom contain?

a)

electrons and neutrons

b)

protons and neutrons

c)

Neutrinos and positrons

d)

electrons and protons

5.

Lithium-7 has how many protons?

a)

3

b)

4

c)

6

d)

7

6.

Nitrogen-14 has how many protons?

a)

5

b)

7

c)

9

d)

14

7.

131Xe has how many protons?

a)

131

b)

54

c)

77

d)

29

8.

Potassium-40 has how many neutrons?

a)

19

b)

39

c)

21

d)

40

9.

37Cl has how many neutrons?

a)

17

b)

18

c)

19

d)

20

10.

Iodine-127 has how many neutrons?

a)

74

b)

53

c)

127

d)

73

11.

How many electrons are in every neutral gold atom?

a)

79

b)

197

c)

118

d)

276

12.

How many electrons are in a neutral atom of magnesium-25?

a)

12

b)

24

c)

25

d)

13

13.

How many electrons are in an atom of 238U

a)

238

b)

92

c)

130

d)

235

14.

This particle determines an element's identity.

a)

electron

b)

proton

c)

neutron

d)

valence shell

15.

These particles of the atom can be counted by looking up the atomic number.

a)

neutrons

b)

protons and electrons

c)

protons and neutrons

d)

atomic mass

16.

What charge does the nucleus have and why?

a)

positive - protons are positive and the neutrons do not have a charge

b)

positive - the neutrons and protons are both positively charged particles

c)

neutral - the neutral charge dominates the positive charge

d)

neutral - electrons cancel out the positive charge of the atom

17.

Elements on the periodic table are ordered by...

a)

atomic mass

b)

size

c)

mass number

d)

atomic number

18.

What subatomic particle(s) would be found orbiting the nucleus?

a)

Neutrons only

b)

Electrons only

c)

Protons and Neutrons

d)

Protons and Electrons

19.
An atoms overall charge is 
a)
positive 
b)
depends on its mood 
c)
neutral 
d)
negative 
20.
The mass of one proton is equal to the mass of one...
a)
neutron
b)
electron
21.
The mass of one proton is greater than the mass of one...
a)
neutron
b)
electron
22.
Which letter represents a neutron?
a)
A
b)
B
c)
C
d)
D
23.
Which letter represents an electron?
a)
A
b)
B
c)
C
d)
D
24.
Which letter represents the nucleus?
a)
A
b)
B
c)
D
d)
E
25.
Which letter represents the electron cloud?
a)
A
b)
B
c)
D
d)
E
26.

The nuclear model was thought be the structure of an atom after what experiment?

a)

Cathode Ray Tube Experiment

b)

Gold Foil Experiment

c)

E. Rutherford made it up

d)

Double slit experiment

27.

The plum pudding model was thought be the structure of an atom after what experiment?

a)

Cathode Ray Tube Experiment

b)

Gold Foil Experiment

c)

J.J. Thompson's thoughts

d)

Double slit experiment

28.
Which scientist proposed that all matter is composed of atoms, which he assumed were indivisible and indestructible building blocks of nature.
a)
J. J. Thompson
b)
John Dalton
c)
Neils Bohr
d)
Ernest Rutherford
29.
Who coined the term "atomos"?
a)
Aristotle
b)
Socrates
c)
Democritus
d)
Dalton
30.
Which scientist proposed that all matter is composed of atoms, which he assumed were indivisible and indestructible building blocks of nature.
a)
J. J. Thompson
b)
John Dalton
c)
Neils Bohr
d)
Ernest Rutherford
31.
Which experiment was performed by J. J. Thompson in 1897?
a)
Oil Drop Experiment
b)
Gold Foil Experiment
c)
Wave  Experiment
d)
Cathode Ray Experiment
32.

Which subatomic particle was discovered as a result of the cathode ray experiment?

a)

proton

b)

neutron

c)

electron

d)

nucleus

33.
Which of the following were outcomes of the Gold Foil Experiment?  
a)
Electrons occupy different energy levels orbiting the nucleus.
b)
Electrons are negatively charged subatomic particles.
c)
Electrons orbit the empty space around the dense positive nucleus.
d)
Electrons move in wave patterns around the nucleus
34.
All of the following of Dalton's theories were correct EXCEPT - 
a)
All atoms are identical.
b)
All matter is made of atoms.
c)
Chemical reactions rearrange atoms.
d)
Compounds contain different atoms.
35.

The correct number of protons neutrons and electrons in an atom of boron-11

a)

5p+ 5no 5e-

b)

5p+ 6no 5e-

c)

6p+ 5no 5e-

d)

5p+ 5no 6e-

36.

The correct number of protons neutrons and electrons in an atom of helium-3

a)

1p+ 2no 1e-

b)

2p+ 1no 2e-

c)

2p+ 2no 2e-

d)

2p+ 2no 1e-

37.

The correct number of protons neutrons and electrons in an atom of fluorine-19

a)

9p+ 9no 9e-

b)

9p+ 10no 9e-

c)

9p+ 9no 10e-

d)

19p+ 19no 19e-

38.

The correct number of protons neutrons and electrons in an atom of 40Ar

a)

18p+ 18no 18e-

b)

18p+ 22no 18e-

c)

40p+ 40no 40e-

d)

40p+ 0no 40e-

39.

The correct number of protons neutrons and electrons in an atom of 30S

a)

16p+ 16no 16e-

b)

16p+ 14no 16e-

c)

16p+ 30no 16e-

d)

30p+ 16no 30e-

40.

The correct number of protons neutrons and electrons in an atom of 23Na

a)

23p+ 23no 23e-

b)

11p+ 12no 11e-

c)

23p+ 11no 23e-

d)

11p+ 23no 11e-

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