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Worksheets8th Grade: Intro to Atoms
Total questions: 15
Worksheet time: 5mins
Name
Class
Date
1.
The atomic number of an element is the
a)
Number of neutrons
b)
Number of electrons
c)
Number of protons
d)
Number of things in stuff
2.
Which of the following determines the identity of an element?
a)
Atomic Number
b)
Mass Number
c)
Atomic Mass
d)
Overall Charge
3.
The nucleus of an atom is composed of
a)
Electrons, Protons, & Neutrons
b)
Neutrons & Electrons
c)
PB & J
d)
Protons & Neutons
4.
Isotopes exist because atoms of the same element can have different numbers of
a)
Protons
b)
Neutrons
c)
Electrons
d)
None of the above
5.
Which statement about neutrons is true?
a)
Neutrons have a mass of 1 amu
b)
Neutrons circle the nucleus of an atom
c)
Neutrons are the only particles that make up the nucleus
d)
Neutrons have a negative charge
6.
Which statement about protons is true?
a)
Protons have a mass of 1/1840 amu
b)
Protons have no charge
c)
Protons are part of the nucleus of an atom
d)
Protons have a negative charge
7.
How many Neutrons does an atom with an atomic number of 23 and a mass number of 51 have?
a)
23
b)
28
c)
51
d)
74
8.
If an atom has 6 protons and 8 neutrons, its atomic mass is
a)
2
b)
6
c)
8
d)
14
9.
Which force holds the nucleus together?
a)
Gravity
b)
Electromagnetic Force
c)
Strong Force
d)
Weak Force
10.
Democritus, who proposed an "uncuttable particle" called an atom was from
a)
Greece
b)
Rome
c)
Turkey
d)
Iran
11.
Electrons do not travel in definite paths, like planets orbiting the sun. Instead there are regions where they are likely to be called
a)
Orbital pathways
b)
Atomic atmospheres
c)
Nuclear scopes
d)
Electron clouds
12.
If an atom has 11 protons and 10 electrons, its net charge will be
a)
0
b)
+1
c)
-1
d)
It depends on the element
13.
The number of ____ determines the identity of an element
a)
Electrons
b)
Neutrons
c)
Ions
d)
Protons
14.
The element with one proton is
a)
Helium
b)
Hydrogen
c)
Lithium
d)
Gold
15.
Isotopes of the same element have the same number of ____ and different number of ____.
a)
Neutrons, Protons
b)
Protons, Neutrons
c)
Electrons, Neutrons
d)
Neutrons, Electrons
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