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Protons, Neutrons, and Electrons MC

Total questions: 25

Worksheet time: 47mins

Name
Class
Date
1.

What is the plum pudding model of the atom?

a)

An atom with a nucleus made of positively charged protons and neutral neutrons

b)

An atom with negatively charged electrons surrounding a blob of positive charge

c)

An atom made of particles smaller than the atom itself

d)

An atom that cannot be broken into smaller parts

2.

Who discovered the first subatomic particle, the electron?

a)

Ernest Rutherford

b)

J. J. Thomson

c)

Cricket Media

d)

Newsela staff

3.

What did Rutherford's gold foil experiment reveal?

a)

Alpha particles could pass through the foil without being absorbed

b)

Alpha particles could not possibly bounce off the plum pudding model of the atom

c)

Alpha particles were as heavy as helium atoms

d)

Alpha particles were made of positively charged protons and neutral neutrons

4.

What did J. J. Thomson's experiments show?

a)

Particles 1,000 times smaller than an atom

b)

Particles made of positively charged protons and neutral neutrons

c)

Particles arranged like a blob of positive charge with negatively charged electrons inside

d)

Particles that could not be broken into smaller parts

5.

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

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

6.

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

7.

Which scientists believed an atom was indivisible? (Choose all correct responses.)

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

8.
What can you conclude from the fact that scientists continue to update the atomic model?
a)
New information about atoms continues to be discovered
b)
Old information about atoms is completely useless
c)
Scientists did not have any information about atoms until a few years ago
d)
Scientists still have no idea what atoms look like
9.
This particle is found in the nucleus and has no charge
a)
Neutron
b)
Proton
c)
Electron
d)
Orbital
10.
What contribution did John Dalton make to atomic theory? 
a)
He discovered that every atom was positively charged. 
b)
He discovered that every element consisted of one type of atom.  
c)
He discovered that atoms had nuclei. 
d)
He discovered that atoms could be divided into smaller parts. 
11.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
12.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
13.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
14.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

15.

Bromine-80 has how many neutrons?

a)

41

b)

42

c)

44

d)

45

16.

The atomic mass of an element is the ____.

a)

total mass of the isotopes of the element

b)

total number of subatomic particles in its nucleus

c)

weighted average of the masses of the isotopes of the element

d)

average of the mass number and the atomic number for the element

17.
Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.
a)
n0 ;  atomic #’s
b)
p+ ; atomic #’s
c)
e- ; atomic masses
d)
n0 ; atomic masses
18.

Which of the following is not a correct designation for a sublevel?

a)

zz

b)

p

c)

d

d)

f

19.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
20.
What configuration do you start electron configurations with?
a)
1s2
b)
1d10
c)
1f14
d)
1p6
21.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
22.
The number of protons and electrons are the same as
a)
Neutrons
b)
Atomic number
c)
atomic mass
d)
Electron shells
23.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
24.

What atom matches this electron configuration?

[Xe] 6s24f145d9

a)

Mercury

b)

Gold

c)

Platinum

d)

Thallium

25.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium

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