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Atoms

Total questions: 40

Worksheet time: 30mins

Name
Class
Date
1.

The smallest unit of matter that still maintains physical and chemical properties are _________

a)

energy

b)

atoms

c)

electrons

d)

compounds

2.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
3.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
4.
Where are protons located in the atom?
a)
orbitals
b)
nucleus
c)
rings
d)
positive
5.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
6.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
7.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
8.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
9.
What are the 3 subatomic particles that make-up the atom?
a)

photons, neutrinos, and isotopes

b)

ions, cations, and elections

c)

positives, negatives, and in betweens

d)
protons, neutrons, and electrons
10.
How does the size of a proton compare to the size of a neutron?
a)
larger
b)
smaller
c)
equal
11.
What is the overall charge of this atom?
a)
+3
b)
-3
c)
0
d)
+1
12.

The central region of an atom where its neutrons and protons are is its

a)

nucleus

b)

electron cloud

c)

core

d)

center

13.

Particles in an atom that are neutral and have no charge are

a)

negatrons

b)

electrons

c)

neutrons

d)

protons

14.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
15.

What do protons, electrons and neutrons make?

a)

element

b)

compound

c)

atom

16.

A region around the nucleus of an atom where electrons are found.

a)

Electron Headquarters

b)

Electron Cloud

c)

Electrical Wires

d)

Electron House

17.

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

a)

12 neutrons

b)

12 electrons

c)

12 protons

d)

24 protons and neutrons

18.

Which of the labeled structures is a neutron?

a)

a

b)

b

c)

c

19.

Which of the labeled structures is an electron?

a)

a

b)

b

c)

c

20.

If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?

a)

11

b)

12

c)

23

d)

34

21.

The person that first recorded the idea that matter was made up of tiny particles.

a)
Democritis
b)
Dalton
c)
Moseley
d)
Einstein
22.
The nucleus of an atom can be described as:
a)
spacious and negatively charged
b)
dense and positively charged
c)
spacious and positively charged
d)
dense and negatively charged
23.
Electrons are not factored into atomic mass because:
a)

They are so small their mass is almost zero

b)
They're not in the nucleus
c)
They're too big
d)
They move so quickly their mass is zero
24.

How did Rutherford discover the atomic nucleus?

a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
25.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
26.
True or False: The majority of an atom is made up of empty space
a)

True

b)

False

27.
Electrons can be found in
a)
The protons
b)
The nucleus
c)
Electron Clouds
28.
Atoms are made up of three basic parts, which are -
a)
Protons, neutrons, electrons
b)
neutrinos, protons, neutrons
c)
quarks, protons, electrons
d)
electrons, neutrons, and quarks
29.
Neutrons have this charge -
a)
positive
b)
negative
c)
neutral
d)
They don't exist
30.
An atom's overall charge is ________.
a)
positive 
b)
depends
c)
neutral 
d)
negative 
31.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
32.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
33.
Ernst Rutherford discovered which part of the atom through the use of gold foil?
a)

Nucleus

b)
Neutron
c)

Electron cloud

d)
Orbitals
34.
If the number of protons equal the number of _____, the atom will have no charge
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
35.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
36.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
37.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
38.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
a)
10
b)
20
c)
30
39.

If the mass number of this chlorine atom is 36, how many neutrons does it have?

a)

17

b)

18

c)

19

d)

can't be determined

40.

What is the atomic number of this atom shown in the Bohr model?

a)

11

b)

12

c)

13

d)

can't be determined

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