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WorksheetsAtomic Structure
Total questions: 15
Worksheet time: 12mins
Name
Class
Date
1.
For a given element, the atomic number indicates the number of _____
a)
protons in the nucleus
b)
neutron in the nucleus
c)
electrons in the atom
d)
nucleons in the atom
2.
For an atom, the number of electrons is equal to the number of _____
a)
protons
b)
protons plus neutrons
c)
neutrons
d)
nucleons
3.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
4.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
5.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
6.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
7.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4
8.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom
c)
the number of electrons
d)
the number of neutrons
9.
Where is most of the mass in an atom located?
a)
in the nucleus
b)
in the protons
c)
in the neutrons
d)
in the electrons
10.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
11.
All matter is made of
a)
energy
b)
atoms
c)
air
d)
chemistry
12.
What is the Element's atomic number?
a)
Fe
b)
26
c)
55.847
d)
Iron
13.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
14.
An atom has 5 protons and 7 neutrons. What is the mass number of the atom?
a)
5
b)
7
c)
2
d)
12
15.
An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?
a)
30
b)
19
c)
10
d)
38
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