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WorksheetsStructure of an atom
Total questions: 18
Worksheet time: 20mins
Name
Class
Date
1.
What are the maximum number of electrons that go on the first 3 energy levels?
a)
2,4,16
b)
2,8,18
c)
4,8,12
d)
3,4,6
2.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
3.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
4.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4
5.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
6.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
7.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
8.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
9.
What is the role of an electron in an atom?
a)
Electrons live inside the nucleus and carry a neutral charge.
b)
Electrons circle the nucleus and have a positive charge.
c)
Electrons circle the nucleus and have a negative charge.
d)
Electrons live inside the nucleus and have a negative charge.
10.
In an atom, what is the number of protons equal to?
a)
The number of electrons.
b)
The number of neutrons.
c)
The number of molecules.
d)
The number of nuclei.
11.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
12.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
13.
The negatively charged particles of an atom are the ______.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
14.
An electron has this charge
a)
positive
b)
negative
c)
neutral
15.
A neutron has this charge
a)
negative
b)
positive
c)
neutral
16.
A proton has this charge
a)
negative
b)
positive
c)
neutral
17.
Most of the atom is filled with
a)
electrons
b)
empty space
c)
the nucleus
d)
protons
18.
An atom with atomic number 6 would have how many protons?
a)
6
b)
12
c)
3
d)
cannot be determined
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